I suppose you could use an amiga client on Winuae/Amiga Forever but you would lose a fair bit of CPU grunt to the emulation.
I have loaded the W32 version, and i have churned 2 lots of jobs.. Make sure you Config up properly.
In the config, go to option 2 (Buffer and Buffer update options, select 9 (load-work precedence) and make sure it reads "OGR-P2, RC5-72=0" (The =0 IS IMPORTANT, without it, it will complete a job on OGR, then switch to RC5), this command TELLS the client to IGNORE RC5.
I cannot get into stats to join Amiga team, as stats site is down.