I know it bugs Dan when demos come out after a game ships which means he's going to be annoyed to know that EA is releasing a demo for Mercenaries 2
(which hit streets last week). The demo will allow you to complete one objective in one of the missions with full access to a selection of the high powered weapons available in the game. The demo will be available later today on Xbox Live and will hit next Thursday for the PS3.
On a side note I wish Sony would release content more than once a week as it seems a bit silly to have to wait almost a week to play a demo that's probably already queued up and ready to go.