Cathal raises some good reasons as to why we should not use a GNU and I think he is correct.
I think many of us reached the same conclusion. Pity, because I asked a cartoonist friend to sketch us up a Gnu playing an Irish harp and what he gave me is absolutely beautiful.
For a bit of fun, I thought I'd give the logo thing a go myself. Here is my effort: http://www.cs.tcd.ie/Malcolm.Tyrrell/ifso.png An alternative would be to colour the letters in shades of green (perhaps 40 shades?).
Before we decide, I think people should submit a few more proposals.
If you'd like to submit something anonymously, send it to me and I'll stick it up on my website for people to see.
Good luck,
Malcohol.