Users can add their own torrent sites.
We tend to be a bit conservative when adding sites, only really search them if they actually provide results that other sites don't, at the moment there are 18 public sites to search and 31 private sites you can enter login details for to search.
There's quite a few cool new features coming out in Bit Che build 60, which should extend the amount Bit Che searches from the already existing sites, however its been delayed for some time because of Chip being busy with real life stuff.
Glad you like it