Sorry, but I disagree with that. As a proud owner of both systems, I made my decision to buy a PS3 EXACTLY for this rerason. PS3 exclusives so far have been fantastic in my view - Drakes Fortune, Ratchet & Clank, Motor Storm - and the ones yet to come - Gran Turismo 5, Tekken 6, Metal Gear 4, God Of War III, Time Crisis 4...all are and will be brilliant games. Don't get me wrong, Im not a fanboy for either console - I own both cos I like both, each for different reasons, I got the 360 mainly for PGR3 and Kameo, and then Gears Of war, Forza 2 etc...
As far as multi-format games go, I almost always buy the 360 version simply because I prefer the controller, but if a 360 style controller is ever released for the PS3, that may change...

Also, as for the online part- PS3's online service is fantastic considering its free, I do prefer Xbox Live at the moment, but you need to remember 360 is a year older than PS3, so it has a lot of catcing up to do still....with Gears 2 on its way though, I think my ps3 will be gathering dust at christmas for a while

my ps3 lasted me a month andim bored with it, ratchet and klank is a stupid game imo and as for gran turismo 5 to be honest im bored of waiting, id rather get couple of hundred quid than have it sat doing nothing losing value, maybe 1 day you could get an xbox controller for the ps3 but that really defeats the object, the whole ps3 systems seems to be very messy and having to listen to the in game music just finished it off for me! the xbox OS is much much better than anything ps3 will ever have to offer, everything jsut makes sense and is where it should be, im not an xbox fanboy as i have them both, i just think the ps3 is seriously over rated for all the wrong reasons