The following links are in Chinese so use Googles language tools for more help.
Bear, a WeiPhone member has managed to modify the clock’s font on the lock screen. Users of Kate and FontSwap allowed you to change this font but limited you to the already pre-installed iPhone fonts. This method doesn’t require the use of either programs. Download here, extract and upload desired font to /System/Library/Fonts/Cache replacing the original LockClock.ttf font. Please note that you can’t simply replace the lock screen’s font with any font of your choice as the font needs to be specially prepared before replacing the original font.

Screenshot:

Lock Clock Font Choices:

For those who were too scared lazy like me to try Erica Sadun’s hacks for the springboard from a few weeks back, now there is an even easier way. Erica has posted a pre-made .plist to replace the original file. The modified .plist enables access to the hacks thru the addition of GUI switches in the settings menu of the iPhone. The modified .plist among other things enables you to set a fake carrier, time, hide and reveal apps and also emulate the glossy, mirrored iPod Touch dock.

Screenshot Of Modified Settings Menu:

iComic is a native iPhone application that allows you to read comics, manga, etc… in .zip format. The application is available via the developers site but only with Japanese menus. I’ve translated the menus to English for the people unable to read Kanji, Katakana and Hiragana. There are three different options for page turning. Gravity Page Slide uses the iPhone’s accelerometer to turn the page for you by just tilting your iPhone. Button Page slide allows you to turn pages by tapping on either side of the touchscreen to advance or go back a page while Swipe Page Slide turns pages using a swiping motion across the touchscreen. To get back to the settings menu while in portrait or landscape mode, tap on the upper left part of the screen. There are tons of comics, manga or books in .zip format available on the web so you’re best bet is Google. The files to be read need to be uploaded into the var/root/media/Comic folder of your iphone. The translated menus are available for download below after the screenshots and need to be unzipped. After unzipping, upload the entire Japanese.lproj folder into the Applications/iComic.app folder overwriting the original files.

Screenshots:

Reading Full Metal Alchemist On The iPhone:

Hacker hachu has developed a plug-in to enable you to download files onto your iphone via edge or wifi and with instructions from rohtik to allow local play-back instead of streaming thru Safari. Files are downloaded to the /var/root/Media/Downloads/ folder of your iPhone. Download the plug-in files from here and extract. Then upload the files into /System/Library/Internet Plug-Ins. Once downloaded, I then used Erica Sadun’s Sendfile program which scans ~/Downloads as well as ~/Media/Documents folders and allows you to e-mail, share or play the file locally. To test this out, I went to Seeqpod to find a song to download. Once you find a song, you’ll see a screen with a green download button and once pressed, will start to download to your iPhone. Then start up Sendfile and it will list the files you’ve downloaded and you’re now able to e-mail, share or play locally from your iPhone. 

Screenshots:

Sendfile program:

The method described below will enable you to virginize an iPhone with 1.02 firmware thus allowing you to upgrade to 1.1.1 firmware. This virginizer is to be used only by iPhones that were unlocked using the Anysim 1.0 – 1.2 or iUnlock method. Do not use this if you’ve used the iPhonesimfree method. Use at your own risk.