I like how entry #11 creates a "P" out of the whitpace. I like that effect.
Entry #8 carries the same "P" effect and makes a nice icon, but the effect gets kind of lost when so small.
Entry #10 is clean (I like clean) but the smybol isn't nearly as powerfl or clever as the "P" in entry #11.
Entry #7 doesn't appeal to me that much, but I appreciate the effort. Reminds me of the Sun Microsystems logo (but the anagram effect doesn't work).
I would probably take "Point. Click. Launch." out of the logo process. Though it is one of our taglines, I don't think it needs to be part of the logo. I mentioned it only because the questions asked what our tagline is.
It would be cool if a "clever" effect could be part of the ProSites name (rather than a symbol), but I do like entry #11.
Our current company logo has the "O" shaped like a monitor symbol (which is kind of clever). Even a newer version or take on our current logo might be worth a try.
Nice effort here bw design.