Last week TheSixthAxis reported that Wipeout HD was still on track. Shortly after that, though, Sony's David Reeves explained that the reason there's no firm release date is that "there is a specific technical problem with WipEout that we have to solve" and that the problem is "a really, really tricky technical problem that no region has been able to solve at the moment."
Could seizures be the problem he was alluding to?