IDE SSD's can be found
hereStraight forward drop-in replacements ... a very good alternative to CF cards and interfaces.
For the past 2 months, I've been using one of the 256mb units partitioned as Workbench: and Work: and thus far cannot fault it. The loading speed is excellent with ver3.1 Workbench loading just a shade faster (by my reckoning) than the same using a CF card setup.
At the end of the day, the real mitigating points is setup time & cost.
A CF card setup can be a right pain in the butt to get working but cheap to buy the parts, whereas - The SSD isn't cheap compared to the CF setup but oh so easy - just prep and format like a standard HHD.
IMHO whatever way you wish to go ... it's a winner! :-)