Here are links to a few more of my logos, in case anyone wants to see a more representative sample.
This is a 3D-reverse-video version of the 'insignia' or 'sigil': http://img511.imageshack.us/img511/8684/sireversebrightmetal.png
This is my original lettering, which I was advised no one else would like: http://img209.imageshack.us/img209/1094/singularityinstitutemet.png
And here's a 'retro' one featuring the SI's 'old' name, with a rather subtle visual gag (is it subtler than the one in my last comment?): http://img200.imageshack.us/img200/1769/singularityinstitutefor.png
Needless to say, I can do any of the layouts with any of the letter forms and any of the surface treatments (and so could anyone else with three of my svg files and a rudimentary grasp of Inkscape).
If you have graphic design experience, check out the on-going logo design competition at 99designs for the Singularity Institute. There are still 6 days left to enter and be eligible to win the $295 prize if your design is selected. Tell your friends with graphic design experience too. There are very few submissions currently.
Note: This is a blind contest. Designers can only see their own entries. All designs will be revealed when the contest ends.
If you're interested at getting a peek at the designs, they will be online after the competition is over. This is standard practice in 99designs contests to prevent designers from contaminating each other and having all the designs drift in a certain direction.