But I don't like your logo it looks to childish in #16 and # 13. in # 14 it goes in the right direction. Please also try black background and maybe like in the flickr logo the shadow effect.
Something between #15 and #14 should be perfect, but it should look more powerful and elegant.
please read also my comments on the contest!!! and see the link!
#22 and # 23 are almost perfect, but could you please try to one version with a big letter "M" in the logo and in the slogan and combinations maybe like in the "microsoft" logo!