#31 Logo is cool, nice 3D effect and having 2 distinct parts makes it appealing to my intended audience who I imagine like puzzles and seeing things come apart/together. Not sure about the colour gradation, it's good but maybe something can be done there.
#32 A bit too simple here and the backwards F looks a bit odd. If F is used in the logo I think it really needs to be part of the whole word as "SF" isn't an appropriate abbreviation for Sfoggle.
#57 I love it! Orange works much better than the grey and the new font and colouring is better too.
Can you experiment with the lettering so it looks less like a standard font? Some of the other designers are merging letters for example. Also the kerning is a bit off with the L...
I just got feedback from a third party that says the colours are too much like Telstra's (telstra.com.au). A lighter blue and lighter orange might fix it.
Also can the curves in #90 be sharpened up a bit? I got another comment saying that it looks like Milo cereal!