I sent myself a reminder to get on the Playstation Network and download my free games before the 30 day window expires, but I don't see any way to do it. I went as far as looking up Dead Nation in the store but it is still $14.99.
Will there be a big obvious button to press to get these games or am I going to have to keep fishing around the store waiting for a few titles to show up as free?
EDIT: I can't answer this, since it is closed, but I keep getting badges for thousands of views, so clearly people want the answer:
Sign in, go to the store, and it is the second menu item on the left. It also appears in the rotation of ads on the right side. You can use this to get both PS3 and PSP games.
You must explicitly redeem the PlayStation Plus for 30 days and the trial starts when you redeem it. They say it won't auto-renew, but then the boilerplate says it will auto renew. You can disable that explicitly in Account management / Transaction Management.