Ah ok, It was only a suggestion anyways, the hashtag thing would be good, dont you think, so people could just click the link and travel there.
Currently the #hashtags in IRC serve as a channel name, so clicking it would take you to the channel name it states.
I've just figured this out, I've done it like follows:
var %lasttweet $replace(%lasttweet,$chr(35),http://www.twitter.com/search?q= $+ $chr(35) $+ )
It does work well, I've added it into that section you posted %lasttweet :)