Tapulous is readying 3 applications that they will release in the AppStore. 2 of them are old friends reworked just a little bit. Twinkle (the geolocation based twitter client) and Tap Tap Revenge. A new application not released to the public yes is called Friend BOOK.
The Friend BOOK application promises to be a cool replacement for Business cards ?? I think we just have to wait a little bit longer to get some info.
Tap Tap Revenge will have some cool new features when it will be released. A multiplayer mode and some accelerometer support. Check the vid for a preview.