It was actually fairly easy. My only complaint is that it's about all I can do. I'd like to make the post a bit richer, perhaps with a link or an icon of the game being played. That'd be pretty easy to do, but it appears that Twitter only allows 160 or so characters of plain text and nothing else. The Twitter API docs are currently about useless, so I really don't know what the extent of Twitter Rich Text is, if anything.
So this is probably gonna be the extent of the Twitterization. I'll add a couple of fields to the Account Manager for your Twitter user/pass and I'll add the twitter-post script to the server, and that'll be it.
My only other worry is that the docs state that Twitter-postings are limited to about 70 posts per hour. I'm not sure if that means per-user or per-host. If it's per-user, then it's no problem because I'll post a max of 11 items to your Twitter account per day. If it's per-host, then I'll have a problem as soon as a dozen or so people sign up because the Twitter will stop talking to me after 70 posts and then the rest of the posts will fall into the bit bucket. I'd have to do something like break up the posts hourly, sending 70 twitter-posts every hour until I went through the whole set.
Also, I'd like to put the whole thing into one post, but again you're limited to about 160 characters per post, so I have to break it up into several.