The protector I have on my TP2 is from eBay from a company called Clear Protector. Also:
http://www.clearprotector.com/
I got it for $7.49 with free shipping and have had it on my phone for about 3-4 months and it's fantastic. There is almost no orange peel effect that I've seen on the Zagg, and it seems to self-recover from indents. This is unlike my gf's Ghost Armor on her Hero. Although hers does not have the "tacky" feel like mine does (seems Zagg is also like this), it has a couple dented scratches into it that have not recovered since they happened a couple months ago. It's nearly a perfect fit and has not come up at all around the edges, but I did use the solution given with the GA to help with the application, since Clear Protector does not give you this (they give instructions on how to use soap/water mix).
Overall, $7.49 is not bad, but the feel sucks compared to the GA. I wish someone made one as smooth as the GA, but also has the self-healing characteristic. :/
Here's a review I wrote up on it a while back:
http://forum.ppcgeeks.com/showthread...otector+review