The BBC has picked up a story about this eBay item, a rather well-done Lego-cased PowerBook 5300 (with the CD-ROM unit from a 3400). Its creator has put up a site dealing with its history here.
The real reason I think this is so funny, though, is because of this. Note the third paragraph from the bottom. Yes, he got a nastygram for trademark infringement from Lego’s legal department. Now that the BBC has gotten on the bandwagon, methinks mebbe the sharks will have to back the hell off.
Stupid lawyers.