I just posted a request for SeaMonkey window icons to my blog, see

I've laid out in the post what requirements we have for such icons
(which might be tough to meet, I know) and asked for people who do want
to work on such an icon set to post links to preview designs here in the
mozilla.dev.apps.seamonkey newsgroup.

I hope the requirements doesn't intimidate people too much and we get
some interesting proposals and a final icon set in the end.

Robert Kaiser
SeaMonkey Council member