The first two I made myself in Microsoft Word.
Dot logo: simple! 3x3 dot array might work for 16x16 icon
Red oval: simple.
Web site mockeup is here.
The following are the result of a collaboration of me and Reb.
The 'Earth in a cage' suggests both a global network of computers,
and an atom (i.e., science).
The original icon came from Cryo64: http://www.cryo64.com/
Pearl, red gradient
Pearl, blue gradient
Earth, lowercase, blue
Earth, lower case, blue, no shadow
Earth, lowercase, copper, large cage
Earth, uppercase, copper, large cage
Earth, uppercase, separate earth with small cage
(to be replaced with large cage)
Earth, uppercase, copper, small cage
Copper text (to be put below a copper logo)
Earth and medium cage only (could use as a 32x32 icon)
Black background (for screensaver):