Where do you post your hosting deals and offers? On forums, right? Now you can post them on Plug That (beta)
http://plugthat.com/cat.php?id=8

It's free and takes 2 secs. No ads, no catch, to the point digg-style review system for web offers.

Then just copy and paste your review page URL (with comments) and you've got your very own testimonials page.