Made this logo myself from the logos different community sites.

Logos I used (letters in capital):
c - faCebook
o - orkut
m - gaMespot
m -gaMespot
u - youtUbe
n - linkediN
i - hI5
t - lasT.fm
y - mYspace

UPDATE: Added 6 New versions of the logo with different effects.

All logos with and without reflection
1&2 Regular Logos
3&4 3D Logos
5&6 Logos with glass effect
7&8 Logos with inner bevel
9 iPhone style logo

Please Vote!!!