Why does this software not work for all sites like some other HM apps? I'd buy it in a second if it wasn't tied to one particular site.
Just basic, not necessarily site specific functionality.
The way Tilt Breaker is listed in the HM apps store is probably a bit misleading. Tilt Breaker is actually just one stand alone app that currently supports 3 sites : Pokerstars, iPoker, and MicroGaming. Tilt Breaker will be listed as 2 versions only (Small Stakes and Pro) in the near future to remove any confusion.
We plan on adding Party poker in the near future and potentially 888, OnGame, and Merge within 2012. The reason we have such limited support is because it takes ~1 month of full time custom development per site. All of TB's core features will be wrapped up around February, so we're hoping to focus purely on new site additions after that.
Fwiw we also had support for FTP and Cereus but got burned badly by Black Friday.
Hope this helps,