I'm considering installing this as I want more traffic but won't people get offended or annoyed with every new thread being tweeted?

it doesn't work... my forum is not utf8, it's iso-8859-2

solved!
I added this line:
$tweet = iconv("ISO-8859-2", "UTF-8", $tweet);

On a busy forum they certainly could. I use Digsby and always have a window open showing nothing but new threads on the forum, but not everyone is savvy enough to use filters like that.

I see, so is there something that can allow to pick and choose which threads to tweet by clicking a button instead of doing it manually?

Who the heck would have the time to sit and do that in a timely fashion? Especially on a busy board. More realistically, just limit tweeting to exclude your busiest forums. But there's nothing stopping you from manually tweeting if you really want to go that route.

Anyone else have a separate Twitter account?

I just use this for SEO and have a separate account that people can follow. So 1 account for your updates/followers and another just for this mod.

I know, but what I was hoping is simply a tweet button next to where it says quote which would tweet the thread using a url shortener. Simple... I don't want to spam my followers with every thread.

I see, two accounts would work but if there are no followers what is the point?

Well if you have your posts tweeted, they create outside links to your site, which is one of the most important factors in search engine optimization (ie. ranking higher on google).

So yah no one would see it because you'd have no followers on that account, but in theory your search engine rankings should improve which is good for your overall site traffic.