thats a great ideea ...im in!
![Cool](https://bitcointalk.org/Smileys/default/cool.gif)
It doesn't matter. Read the thread. Theymos answered this question last year. We won't see any tipping extension implementations in this forum.
I've thought about that before, but I think that there might be legal problems with that. It might make the forum a "money transmitter".
However you are free to use your signature space for collecting Bitcoin donations.