I dunno, the problem is that the games are old enough that many people who want them probably already have them. Not knocking Sony, but the truth is for some of us the list is only a gesture.
Personally, I already have LittleBigPlanet. I played the inFamous demo and it just didn't appeal to me. Similarly, even though many people have suggested Super Stardust and Wipeout, they're not my cup of tea; if they were, I'd have purchased them a long time ago.
That leaves Dead Nations as the only game that I haven't heard of, don't own, and piques my interest. I'm actually tempted to connect to PSN and update (which would take a while, as I haven't logged on in something like 6 months). But the more I think about it, I already have a bunch of games backlogged, and there's no reason to add two more games that I very well may never end up playing.
I'm in exactly the same spot. I already have LBP and inFamous (have had for over a year now), and WipEout/Stardust do not look interesting to me in the slightest. I guess I'll DL Dead Nations, but meh. LBP and InFamous are pretty awesome giveaways .. a shame anyone that has really wanted to play them already bought them (well, I'm sure Sony knows this).