Hashtag Mod?

[Eplexx]

I'd trying to find a mod like the hashtag on twitter.

Idea:

When your writing a thread and say you want to be like twitter where you can write a hashtag for an item and when clicked on said hashtag it'll goto hashtag.php or w/e and show all the posts with that hashtag. example: "I'm programming something in #php and would like a #designer to help."
or it could be in a quick reply as well.

I hope people here can help me find a mod like this or code one as I'm sure others would enjoy this mod as well!

Thanks