But I can't post screenshots like this in that Flickr group, since, while it is a screenshot of my N800 running Firefox 3 (Iceweasel is the Debian rename of Firefox), it isn't Maemo...
No, IceWeasel is a FireFox "fork" maintained by Debian. The extent of forkage is to replace the copyrighted images (and name) due to licensing issues; everything except graphics & name tracks FireFox exactly.
I'm confused. What's the point of forking software if all that changes is the branding. Call me silly, but I don't see the point of it (assuming that's all that will happen with it).
It has nothing to do with technology. It's all politics and people ruffling up their feathers. See the Wikipedia article for a fairly sanitized retelling of the sorry tale. But I must say, even if we got nothing better out of it, the Iceweasel logo really rocks.