I hate Rapidshare with a passion. It would be nice, IF it didn't make you go through hoops to download from the free servers and didn't spam the pay service all the time.
Oh, and that 30 meg per hour limit is terribly annoying too.
On the other hand, you can get yo'self a surplus old laptop 2.5" hard drive, a USB-to-IDE cable, and tote around that. Presto, 10 gigs of space for the price of a 512mb pendrive.