In fact, I made that suggestion for Phase 2 of the forum overhaul, which should begin in the next month. No word if it will be implemented, but it would certainly be a welcomed addition.
One of the features which i think would be really useful, which i can't see implemented on this forum, is a solved button.
I have seen this on a lot of forums, and basically it you had an issue which has been solved, you click solved, and then instead of reading through all the posts, users can just read the solution, which would save a lot of time.
Could this please be impmented?