I just got back from a shopping trip for accessories for the Ultra 20. I ended up at Micro Center, which was a good choice – fine price and selection, focused on computers (unlike, say, Best Buy), and not only do they treat people who enter in their store as potential customers instead of potential thieves (which is why I refuse to go to Fry's), they even have a good number of sales staff (unlike no end of stores out there). I will be happy to patronize them in the future.
The Ultra 20 and the networking stuff should be here by Thursday, so I guess I'll spend the end of the week setting that up, and moving my home Linux use off of this laptop. (I'll still use this laptop as an X terminal until the new laptop arrives. And probably even occasionally after the new one arrives, since Liesl will want to use the new one during those rare moments when she can pry herself away from Animal Crossing.) The only remaining task before then is to download and burn a set of x86_64 FC4 CD's; easy enough to do.