FW 800 is not badly needed, indeed it has no practical applications yet. I'd imagine they'll be introducing it very slowly, perhaps including it on normal revisions over the next year... it certainly doesn't require revisions of it's own... As for the iMac, which is rumored to have an upcoming revision, i don't know if there's signifigant cost involved in adding it, so i really can't speculate on whether or not it will include it. There's no real reason to delay adding it, either, since Apple is trying to show that it's a true up and coming standard...
🙂
pnw