I just downloaded it the other day - I have a MSDN Enterprise license - and installed it on my Mac at home. It's a dual 1.25 Power Mac G4. It runs OK. The System Properties control panel says it's running a Pentium II at 650 Mhz although I'd say if feels like less than that.
I'm not used any apps on it, but I plan on running some things later this week and next. It would probably play poker fine. There are lots of poker java apps on the web for playing with other people. My wife plays one regularly, but I don't know which on it is.