I used nuevasync to synchronize my google calendar with my iPhone.
Several months ago, google launched its own sync service, named google sync. well, it’s already got almost all the function of nuevasync, including multi-calendars, two-ways-sync and it is much faster than nuevasync. But i don’t like it because of its stupid color system . You cannot change the color of those calendars unless you pay the money (use MobileMe).

BUT i found a solution finally, specifically for jailbreake iPhone:

I found another way to do this, just playing around like you did. Copy calendar.sqlitedb from the /private/var/mobile/Library/Calendar directory on your iPhone to your computer, and make a backup of it (recommended). Open it with SQLite Dabase Editor (http://sourceforge.net/projects/sqlitebrowser/) and go to the second tab, “Browse Data”. Under “Table”, choose “Calendar”. This will give you a list of all of the calendars on your phone. Each row is a different calendar. There are three columns - color_r, color_g, and color_b. Set these to whatever you want for your RGB colors for each calendar. (It is not limited to five colors). Save the file and copy it back to your phone.

1. Tags Tools:

• Tags&Rename: as I said, it is the best application to manager your MP3 tags, see my post for details (more than 3,000 songs for me).
•  Winamp and iTune: still useful for tag-editing with a few songs

2. Lyrics Tools:

• iTunesFriend (freeware): Good application for ENGLISH Lyrics downloading with your iTunes Library. (Download Link)
• MiniLyrics (freeware): Google application for CHINESE and ENGLISH Lyrics downloading. Better use it with winamp intro play plug (Download Page)
• Winamp Intro Play Plugin: use it with minilyric to get lyrics quickly (Download Page)

3. Repair Tools:

• MP3 Validator (freeware):  Sometimes, you will find iTune and/or iPhone can not play some MP3 songs. This application can fix them for you. (Download Page)
• Switch: If your mp3 cannot be fixed with MP3 Validator, you can use this application to rebuild MP3 file.You can also convert other formats into MP3 with it. (Download Link)

4. Convert Tools:

•  Monkeys Audio & LAME 3.98-final: Rank-AAA Software for conversion. You can generate high quality and relative small size MP3 (VBR MP3) from APE or other formats music. For details,go to my post.
• Switch: it is not a good software for conversion coz I found it may give the wrong time and bit rate after conversion.

更新：用此软件还能解决中文tag显示为乱码的问题

Problem:
iTune and iPhone 3G provide a fancy function - Showcasing your album artwork when you listen to your music. But it is quite tedious to add the artwork by yourself.

Solution:
Tag & Rename is a music files tag editor -- easily handles all popular digital audio formats, as it said on its website.
It supports a lot of formats. With it, you can edit your mp3 tags, including artist, title, album name, etc. And you can load the album artworks from amazon.com.

Step by Step guild:

1. Download the software from Tag & Rename.
2. Install it and open the folder contains your music, select mp3
3. Press "F4" to batch rename your mp3 or Press "Shift+F4" to get the correct tags from your mp3's name.
4. Press "F11" to synchronize your mp3 tag between ID3v2 and ID3v1 ( you may switch the tags view between ID3v2 and ID3v1with "Alt+1" and "Alt +2").
5. Press "F10" to get Tags info from amazon.com including Cover Artworks.
6. Please be noted that  Tag & Rename is not a freeware. You have to do sth if you want to use it after one month...

Trailguru is a wonderful iPhone 3G Apps for sharing the outdoors.

You can track your outdoor activities by GPS signal and review it or share it with your friends at anytime on Google Earth.

www.trailguru.com/wiki/index.php/Track:2OB6

注：部分内容转自网络

所需要软件： Monkeys Audio 3.99版本 和 LAME 3.98-final

所需要的补丁：APX文件 (我自己编辑的)

APE格式是喜欢在计算机上尝试HIFI的朋友们所钟爱的一种音频格式，它提供了无损的音频压缩和实时音频解码。在计算机上使用时，这种编码格式无疑提供 了最好的音质和非常方便的使用性。但是对于MP3播放器这些随身听音频播放器，这种格式目前仍然缺乏有效的解码支持，而且其编码后“臃肿”的文件大小，也 让人又爱又恨。其实我们用来编码APE格式文件的工具Monkey's Audio不仅提供了APE格式文件的编码功能，同时也提供了非常好用的APE解码和APE于其他音频格式文件的转换功能。

言归正传，网上这类转换的文章多不胜数，但是抄来抄去，内容都一样；要命的是，都不成功。所以如果你想自己转换成好的MP3，请跟我的来。

一、准备工作。

下载Monkey's Audio，假设安装到C:\Program Files\Monkey's Audio。
下载LAME和APX文件，并把解压缩得到的一堆文件放到C:\Program Files\Monkey's Audio\External中。
检查一下所下载到的APE文件，一般会包含两个，CDImage.APE 和 CDImage.cue。如果是用的其他文件名，建议修改成CDImage.APE和CDImage.cue。

二、选择开始菜单中的Monkey's Audio菜单下的Make APL's

打开CDImage.cue文件，转换之。这样在和CDImage文件所在目录下会得到生成的APL文件。注意这里可以选择输出的文件名格式。

三、选择Monkey's Audio为Decompress方式(Ctrl+2)

用monkey's Audio打开刚才生成的APL文件，把APE文件解压成若干个WAV文件。

四、选择Monkey Audio为Compress方式 (Ctrl+1)

打开刚才生成的若干个WAV文件，然后勾选External项->External->Lame->Configure项中填写 -V0 -q1 。随后点击Compress，你就会得到相应的MP3文件。（注意，这里可以在Option里面选择Tagging功能，这样就可以在iTunes或者Winamp等播放器中看到对应MP3文件的Tag）。

Google Chrome has been released!

You may have no idea about Google Chrome just like me. But we can now try it.
Go~, download google's browser and enjoy surfing on the web.