Playstation Network Times Out After 2.00 / 2.01 Update

Prior to the PS3 2.00 / 2.01 update I was able to access the Playstation Network to download demos, movie trailers, check messages and play games online.After the 2.00 / 2.01 update I'm no longer able to retain a connection for more than 5 minutes - that's a good scenario typically I can't connect at all as the system informs me that the connection has timed out.I've tested my connection using