I'm on a different board aswell as mod. and there is a huge amount of dodats you can build into a board to filter out such spammers.
However they allways find a way to work around it, so its a neverending battle nomatter what.
For the moment we (on the other board) have enabled the letter-verification known from many places, aswell as e-mail verification.
I am experimenting on moderation of the forst few posts, this means making a whole new usergroup in wich all new registrates are put into automatically. This group (1-5 posts, usergroup) cannot post without moderation of the post.
However effective against spammers the last bit is, it does however make it more cumbersome to new users, as their first few posts will not be shown until moderated.
Its a case og pro's and con's really, and i do not believe i have found any decent other way to do this, yet.
I don't believe that BCUK is as troubled by it as many other places though. However that might change.
The "new" spammer, actually posts a sort of personal post with a little intro and a question that appears valid enough.However the question naturally leads to people googling the item, wich almost for certain is some sort of internet hacking program under a cunning alias, meds again under alias's, or simple pornography under an alias. It is also spam, as the question is search-engine targeted, and search engine hits almost allways leads to cashflow for the spammer (commercials and what not).
Oh the good beautyful and bountyful world of internet i suppose