Even though the price is in the stratosphere, at least SDD capacities are finally the same order of magnitude as magnetic disks. A few more years of Moore's Law should get the price per GB more competitive. Right now 32GB, which seems to be the sweet spot for SSDs, can be had for roughly $400 to $500. This is perhaps 75 times the price per GB of magnetic storage. This will probably drop by a factor of four or better each year as flash RAM densities go up. Give it another three years, and we'll reach price parity with magnetic disks while matching or exceeding capacity.
My own personal price point is $99. Right now I can get an 8GB SD card and IDE adaptor for that price, and still have money left over. However, 8GB is not really terribly useful these days (except for a pure DOS machine) so I'll wait. I would definitely buy a 128 GB SSD for $99, even though the cost per GB would be higher. It would make a great boot drive.