I just read this over at Game Stooge and wanted to share this with you all.  I am simply going to copy and past this article from that site as I think Jonah Falcon summed it all up properly.  Please be sure to check out their site when you have a moment and thanks to Game Stooge for the story.

-Wingman709

Today 2:24 PM|Jonah Falcon

PlayStation 3 owners are apparently having serious issues with online multiplayer on Call of Duty: Modern Warfare 2, apparently caused by a patch to fix a trophy glitch.

[Infinity Ward's Robert] Bowling, PS3 owners can expect a “party invite update by Friday,” which should hopefully resolve this issue. Until then, players will have to make due with the single-player campaign. It’s not like this “multiplayer” thing is important, right?…

Update 2: Tipster Brent point us to yet another tweet, this time from Robert Bowling who confirms the multiplayer downtime is caused by server overload. According to Bowling, “Xbox Live servers are maintained and ran by Microsoft. PSN servers are ran and maintained by 3rd party companies hired to do so.” Seems this mysterious “3rd party” infrastructure simply cannot match the Microsoft-funded backbone of Xbox Live.

The moral of the story is: you get what you pay for.