yes, as far as I know, Griffin has discontinued the AirClick USB as well as support for its accompanying OS X software.

Remote Buddy users are not affected by this, though, since

1) you can only use _either_ Griffin’s software or Remote Buddy, but not both at the same time. If you want to use the remote with Remote Buddy, the Griffin software is not relevant at all.

2) Remote Buddy brings its own driver (Candelair) for the AirClick USB. Candelair is compatible with the latest version of OS X (10.8). This makes the lack of drivers from Griffin irrelevant to Remote Buddy users, who can use the AirClick USB regardless.

Both Remote Buddy and Candelair are under active development.

Best regards, 
Felix Schwarz