I picked up a Roland S-760, A Pioneer 6 stack SCSI CD-ROM drive and the 6 CD library of sounds from Roland for $200, $5 and $100 respectively. I used that for quite a while and then decided to move to Kontakt.
Nice. I'm still looking for the original Roland sound CD-ROMs for the S-7x0 series...
If there's an app like Kontakt for the iPad.. that might be a good reason to get an iPad.. (the Korg apps look cool).