I've no idea what batch my board came from... it has been so long! It still works though so it was definately made to last. It hasn't even got a case, it just sits ontop of the desk with cables hanging off it.
There are RevA boards - with the single joystick connectors on the back. There are only four of these with developers.
RevB1 (around 20 exist), with double height joystick and option of SVHS/Composite vid.
RevB2 (around 50 exist) is the same, but with the spacing between the DVI and audio jack improved, as well as a fix for DVI power backfeed (powering the board through the monitor basically).
RevB2 batch2 (100) is currently on it's way from China. Exactly the same as B2 but with FCC logo on the board as well.
New firmware supports all RevB boards.
It's printed on the top of the board, Darrin you have a B1 I think.
The new USB adapter replaces the PS2 connector and can be fitted on any all RevB boards.
/MikeJ