I'd love it if even one of them were worth using. Right now, I'm in the market for two commercial themes - hoping for WP plus BBP or Buddypress... can I find any way to find what I'm looking for? No, I cannot.

I'm more than capable of customising (or indeed, writing my own theme - I just don't have time), so the way these themes are categorised is crazy. Why would Theme Sorter sort by "church", or "mummy blog" or colours, when a simple tweak of some images or CSS would change that?