So Ausir alerted me about some court drama between Interplay and Bethesda yesterday and it's pretty intense stuff. Here is the stuff I copied from RPGcodex;
The breach of contract claims asserted by Interplay (...) fail because Bethesda is not obligated or under any legal duty to allow Interplay to utilize the panoply of Fallout assets in connection with an MMOG. Interplay transferred its right, title and interest in and to all Fallout Intellectual Property to Bethesda for $5.75 million. This included, among other rights and properties, all characters, story lines, weapons, art and other game related assets as well as the copyright and trademark registrations that protect same. (...) In the APA, Interplay further represented and warranted that any and all Fallout game assets that it owned were being transferred to Bethesda.
Interplay’s use of Bethesda’s Fallout intellectual property such as characters, weapons, and story lines was not a “benefit of its bargain” as Interplay claims. The only bargain Interplay made for a MMOG was the conditional right to use the FALLOUT trademark.
So basically Bethesda is sayign that Interplay can't use any Fallout material besides the name. You can read the full document of stuff here at ausirs playground.