#13 looks a little bit like Sony Ericsson i think, but it looks playfull which is great in our opinion. #17 looks cool, because we see kind of "building blocks" in it (the orange ball on top).
Maybe you can combine the playfull idea with the building blocks?
Also, could you vertically center "webbler" (we prefer lowercase) and use a friendlier font?
Super! To finish it off a little bit, you could add "content management" to it (as a "slogan" or extension to "webbler" like; "webbler content management").
About #13, we like the idea of the playfullness, if you could make it a little less "sony ericsson" (if it's possible anyway), and more into the building block / module idea, it would make a great logo i think!
We're heading home now, thanks for your submissions, certainly like a tagline with the logo! We'll be back tomorrow morning (in 13 hours or so), have a great day over there!