Regarding Linux & Mac:
The new cpuminer version that is coming out in 7 days is almost completely cross platform with native Linux/Mac compatibility. Im working hard to remove windows features and make the new versions cross compilable.
In the mean time, you can download the windows MSI and run it on Linux in wine with "wine gridcoin.msi", after it installs, run the shortcut, and you should be able to mine with that version.
Rob
Excellent, great to hear man! : D
On another note, anyone who is interested in beta testing gridcoin and participating in the test network should visit this thread on how to connect to the testnet & how to report issues:
https://cryptocointalk.com/topic/9612-testers-wanted-test-net-gridcoin-testing-thread/