Updates:

WeatherIcon 2.1.2 - Update | Cydia
All users who run the jailbreak Firmware 3.0 and who love to change the theme on the phone will have surely noticed that the weather icon is not changed. David Ashman has recently released an update of its WeatherIcon that comes to version 2.1.2. Install it via the repository of David: http://david.ashman.com/apt/

Inspell and Hunspell: Two new applications for the correction and management of the dictionary keyboard iPhone | Cydia

Sleep To Lock 1.0 | Cydia

Five-Column Springboard 0.57-1 - Update | Cydia

mQuickDo (OS 3.0)

MiVTones for OS 3.0 (VideoRingtone when receiving calls)

Keep Alive

MobileMusicPlayer

ForwardMsgFix: To remove the pop-up "Call Forwarding Active" Firmware 3.0

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VolumeBooster that should increase by about 20% the sound coming from iPhone / iPod Touch 2G speaker. It's compatible with 3.0 Firmware Jailbroken and follow the instructions to install.
1. Download this file and extract: VolumeBooster to 3.0

2. Connect via SSH to your iPhone / iPod Touch;

3. Navigate to / System / Library / PrivateFramework / Celestial.framework /;

4. Rename the file "RegionalVolumeLimits.plist" in "RegionalVolumeLimits.bak";

5. Copy the file previously downloaded "RegionalVolumeLimits.plist" in / System / Library / PrivateFramework / Celestial.framework /;

6. Assigned to the new "RegionalVolumeLimits.plist" permissions to 0777;

7. Restart the iPhone / iPod Touch.

Use this at your own risk.