I've been keeping my eye on the 2488 for a while. Currently I have a Korg D16, and a PC rig as well. I was considering upgrading the d16 to the 2488, but at this point it doesn't seem like it's really going to be worthwhile in my case. I'm getting really good results with my computer rig on it's own and tend to use the Korg mainly for pre-production, etc.
Except for the 24 tracks at 24 bit, the 2488 has a lot of the same limitations as my d16. On the other hand, for someone who doesn't have a recorder already, or a really good computer to put a daw together with, I'd say go for it - the price is right! I think it would work best though, in combination with a basic pc rig - dump the recorded tracks into your compter via usb for mixing/editing, and cd burning. My 2 cents.