The iphone-dev team has released the pwnage tool that will allow you to make your iphone work with whatever software/application you choose. Reports are coming in that it works pretty well, but you do need to have the iphone 2.0 firmware before you install the hack tool and all your favorite apps. Here is a blurb about the 2.0 firmware from Apple.
CUPERTINO, California—March 6, 2008—Apple® today previewed its iPhone™ 2.0 software, scheduled for release this June, and announced the immediate availability of a beta release of the software to selected developers and enterprise customers. The iPhone 2.0 beta release includes both the iPhone Software Development Kit (SDK) as well as new enterprise features such as support for Microsoft Exchange Activesync to provide secure, over-the-air push email, contacts and calendars as well as remote wipe, and the addition of Cisco IPsec VPN for encrypted access to private corporate networks.
Find out more from Apple about firmware 2.0 here
The pwnage tool is very easy to use. First you need to back up all your iphone data using itunes.
After backing up your data, connect the iphone, select the firmware from your hard drive and pwnage will upload the new firmware to the iPhone. The tool takes care of the rest. Now you can wet yourself, turn up the volume on your favorite Sesame Street album or do whatever it is you do when you get excited.
Get your pwnage tool here.
If you are having trouble or want more info on installing the pwnage tool, check out Engadgets video.