Oracle has announced that classic metalink is going to be retired by end of 2009. I don't like the new metalink much as it times out regularly and is not very intuitive. However, what must be must be. Oracle has a metalink note 838708.1 which has information about what you can do to prepare in advance. Adobe Flash player 9 is a pre-requisite and needs to be installed.
I have tried using the new metalink or "My Oracle Support", however I get frustrated when I am not able to do simple tasks. I'll have to get used to it, as Oracle will retire classic metalink which I access through metalink2.oracle.com now.