Install the Hackulo.us repository as outlined in a previous post. Tap on Sections and navigate to Hackulo.us folder. Install the following files:
AppSync for 3.0
Installous
Restart your iPhone, and then launch Installous. Search for your AppStore application and download/install it. Once you’re satisfied with its usage, delete the application and purchase it from the AppStore!
Many requested features for the iPhone are available through 3rd party extensions on Cydia. Below you will find a list of commonly requested features that can be added through the application. Simply search on Cydia using the name and you’ll find what you’re looking for! This list is constantly updated as new applications come out.
Video Recording (2G/3G only): Cycorder
Themes: Winterboard
Music Sharing: MewSeek
Ringtones: PhoneZap
Password Protect Applications: Lockdown
Cydia allows for the addition of as many repositories as you want. What is a repository? It’s basically a webserver that hosts files that you can install on your iPhone. Some repositories, such as Hackulo.us, allows you to add increased functionality to your phone’s backend. Others, such as XSellize, allow you to download and try out applications before purchasing them. To add a repository in Cydia, follow these instructions:
Once on this screen, type in the full URL to the repository.
Hackulo.us: http://cydia.hackulo.us
XSellize: http://xsellize.com/cydia/user-password
XSellize requires a username and password to access their repository. Simply sign up on their website and you should be able to access it.
You’re done! You just added a repository in cydia 
With the upcoming release of the Nintendo DSi, you would think that people interested in the original DS and DS Lite would stop buying stuff for it. You’re wrong! The newer modding tools are designed to be compatible with not only the Nintendo DS (phat) and Nintendo DS Lite, but also the upcoming Nintendo DSi. I used to be big in the modding scene and had a few favorite shops, and one of those favorites closed down 
. However, I recently revisited the site and it looks like they’re gearing up for the DSi release and started it back up. Check them out at http://www.modmydsi.com – I recently spoke to a customer service representative and things look like they haven’t changed a bit – still great customer service and great prices!