Having actually read the OP now I only have this to say:
STAND AND DELIVER!
/points gun
Has anyone seen the youtube video of the American guy running for some kind of office, he's stood up, starts all calm, then paces around shouting like a mad man. I was kinda hoping someone would have posted the video here, I can't for the life of me remember the name of the video! Its a good few years old *sigh* I'll never find it again.
Also for the OP, definately stand up!

I think sitting down is better especially if the room is tiny. I haven't been too or done a meeting where anyone stands.
I'll continue to remain seated. It seems to work.

Has anyone seen the youtube video of the American guy running for some kind of office, he's stood up, starts all calm, then paces around shouting like a mad man. I was kinda hoping someone would have posted the video here, I can't for the life of me remember the name of the video! Its a good few years old *sigh* I'll never find it again.
Also for the OP, definately stand up!
?
Having given many presentations (both seated and standing), often find seated works better when it's more of a discussion piece and a relatively small audience (i.e. less than 5), but standing is when it's a lot to get through and I'm "facilitating" discussion between everyone else in the room (if that makes sense).
Personally though, if I sit down though, my style suffers a lot, I just can't speak loudly, and end up looking at the laptop rather than the audience... standing I find myself acting rather than presenting, but seems to work..