I am developing an IPCC (Carrier Bundle) Generator which should be available soon. There are a couple of others available on the internet at the moment but they are not fully compatible with the latest iPhone 3.1.3 software and a little hard to use. It is in development at the moment so is not pubiclly working at the moment but over the next week or two it will be made public. If you have any ideas/suggestions please let me know.
It is HERE but the main form will not give any carrier bundle as of yet. It looks quite ugly at the moment, has no real formatting, but will continue development.
A carrier bundle sets all the options for a carrier such as custom icons, links, voicemail settings, APN settings, MMS Settings and alot of other options which cannot be set with a mobileconfig.