The 2009 FIDE Congress is happening as I post this. I had hoped to attend this year, but a shift in venue from Singapore to Haldiki in Greece made it difficult both in terms of time and money.
In non-Olympiad years the majority of the congress is taken up by technical meetings, as there is no General Assembly. My main reason for wanting to attend was to take part in the meeting of the Technical Administration Panel (TAP), which is responsible for Olympiad issues. I've received a brief report on the meeting from Nick Faulks who described it a 'purely technical' and confined to pairing rules for the 2010 Olympiad. The major decision to come out of the meeting is that Accelerated Pairings will not be used. I'm sure this will please most teams.