Get Wipeout HD for free by creating an Austrian PSN account
If you create an austrian PSN account in the time between March 16th and April 18th they’ll send you a download code for Wipeout HD to the e-mail you registered with.
They’ll send out the codes after April 18th.
Source: http://allgamesbeta.net/2009/03/16/get-wipeout-hd-for-free-by-creating-an-austrian-psn-account/