Sony have today release the version 1.1 patch for Wipeout HD which fixes issues that users were having when signing into the network.

Since the game was released users with more than 50 friends had been experiencing a complete system freeze when logged into their profile and attempting to play the gaming, the only fix until now was to sign out of your profile and then play offline. Thankfully the new patch has resolved these issues, so there should be a lot more people playing online from now on.