If they can make a 64gig flashdrive for like, $70, why do 64gig ssds cost so much more ?
As Raserei mentioned, the priciest component of an SSD is the controller/memory. If you'd benchmark a USB drive, depending on the model, most get average R/W speeds of 5MBps/2MBps. SSD's can reach into the 500MBps mark. It's similar to the difference between cache and memory, albeit they're pretty much the same internally, one is extremely fast, the other is slower.
If there was a 2TB 10k RPM drive (not sure if there is right now)
Would you buy that or would you buy the SSD with little storage room?
SSD. First of all, even 2TB 7200rpm drives are incredibly prone to dying on you, so I could image a 2TB 10k drive being doubly so. Second of all, a 2TB 10k drive would get incredibly hot...
I like storage, but I don't like losing all my data.
However, if given the choice, I'd just get three 750GB 7200RPM drives and pop em in RAID5.