I've been signed up with SionIAM.com for a while now, but kept forgetting to mention it because it's a pretty standard ptc site, with a various options for increasing traffic if you're interested. Standard doesn't have to mean bad, however, and the site certainly isn't. It doesn't intrude constantly with "OMG GREAT OFFERS" or constantly bother you to upgrade your account. In addition to that the site admins don't take long to get back to you, and the site isn't hard on the eyes (it could use a logo though). Anyway, I use it, and would recommend it to anyone.
Overall, thumbs up!