Other than a community add-on no longer working (Transmission), T9 has been working great for me so far -- AFP access through Finder, Time Machine, both without any issues from Snow Leopard and Lion clients (this is on a ReadyNAS Duo).
Transmission 2.33 is working OK for me on T9. http://www.readynas.com/contributed/super-poussin/Transmission_2.33.bin (this is newer that the one on the transmission page)
OK, I can confirm that 2.33 appears to work, though launching the Transmission interface from the FrontView Add-on configuration window produces a blank Safari window. Thanks for the link, ObiWan84!
