Does anyone have any experience or knowledge of www.socialmarker.com. I recently watched a video that recommended and displayed this site and at that time they had around 30 social bookmarking sites and now that has reduced by almost half. Although I'm sure it'll be no great loss to sign up and try it out, I was hesitant as they don't even have Delicious on their list (which is about the only social bookmarking site I'm familiar with right now) and was wondering if it was a bit of a shady site.

Any insight is greatly appreciated! And any good insights on using social bookmarking sites would be an added bonus!!