If you're looking for a bit more on the whole "Bethesda suing Interplay" thing, Ausir has written up the latest based on more court docs:
 
<p style="padding-left: 30px;">In June 2004, Interplay originally only licensed the rights to develop three Fallout games to Bethesda, while keeping the ownership of the franchise and retaining rights to develop a Fallout MMO, based on the Exclusive Licensing Agreement (ELA). Bethesda only purchased the rights to the franchise as a whole in 2007 by entering into the Asset Purchase Agreement (APA), at the same time licensing the rights to develop and publish the Fallout MMO to Interplay via the Trademark License Agreement (TLA).
 
<p style="padding-left: 30px;">Based on the terms of the original 2004 ELA, Interplay was allowed to create a massively multiplayer online game using the name “Fallout” and based on elements of the pre-existing Fallout games created by Interplay, but not on any material created by or for Bethesda. However, the ELA was later superseded by the APA and TLA, the latter of which only vaguely states that Interplay can use the trademark “Fallout” to create a Fallout-branded MMOG.
<p style="padding-left: 30px;">[...]
<p style="padding-left: 30px;">Interestingly, Interplay also claims that Bethesda violated the TLA by attempting to "grant another party Interplay's rights" regarding the Fallout MMO. No further details are given.
 
Thanks <span style="text-decoration: line-through;">18</span> 16!