Ditto. I have been on the hunt for more memory for mine for a long time at a reasonable price. I have seen exactly one standalone card on eBay in that time, and it was just a 24mb one. Look for parts machines where the RAM is specified. Most of the later machines had a 8mb 'starter' card and then anything above that is added ram in the upgrade slot.

The Orinoco cards work well for wireless internet, though the speed is quite slow, of course.