Yes, it can take EDO simms.
You only need the driver disk if you have 3.0 ROMS, because RAM isn't automatically recognized under 3.0 Under 3.1 the board autoconfigs.
If you get random lockups or gurus, try a heavier powersupply.
I used it with a "heavy" a500 PSU (the one with +5V @ 4.5A) with no problems.
I just recently bought the card, and my first impression is that it's a great card.
Haven't tested it much with games yet.
The only disadvantage is that you can't easily disable the card like you can with a Blizzard.