Bluetooth printing from iPad?
@Jason's link to SO is correct - the out-of-the-box iPad will not support Bluetooth printing. However, there are receipt printers like Blue Bamboo or the Star Mobile printer, but these solutions might not be what you're looking for.

There are iBluetooth apps now in the iOS App Store - it's possible that the vendor no longer supports the Cydia version.

Another possible solution is an app like PrintCentral, which allows for printing wirelessly over 3G and WiFi.