There is a functioning version for Drupal 7, however it was tweaked by the company sponsoring it, to accommodate their needs. It isn't as universal as the D6 version, but works... I have the update, just haven't had time to get it uploaded.
Over the summer of 2012, I expect to migrate some of my D6 websites to D7 and UC3. If you want the same functionality of D6, I suggest waiting until then. Otherwise, you can try out the D7 version to see if it suits your needs. These will ultimately have two different version numbers (i.e. 1.x -> 2.x) because of the difference in how they work.
Stay tuned and I'll try to get the D7 version up this week.