MTV's Stephen Totilo recently grilled Housemarque co-founder Ilari Kuittinen on the update, who commented that "a majority" of the development time spent on the update was focused on the new versus mode, which will feature "our 'sub' game modes and plenty of options so each gamer can tune the mode to suite their tastes." Even more interesting, Kuittinen adds that the team has been "experimenting with a game mode we call "Twin gun" mode (not disclosing specifics at the moment, maybe you can guess?) and how to make music generated levels, etc." It sounds like someone has spending a lot of time with Audiosurf, an addiction to which we can certainly relate.
[Via PS3 Fanboy]