[twunde]

Not tech related, but I had a history teacher in high school with a stammer. He lectured/led discussions even though he had a stammer and was probably the favorite teacher of students in the entire school. I think he may now be a head of a different school. I don't think his path was easy and I know he was discouraged from teaching early on, but a speech impediment shouldn't stop you from anything you want to do.

On a practical note, it's offen best to do the most painful things often. You may want to consider joining a local toastmasters club and doing talks once a month. One you're used to doing that, running meetings won't be so scary