As I mentioned in the Scottish Developers July Newsletter Microsoft are running speaker training sessions to help community speakers get started or improve their skills with regard to technical presentations. I just got an email earlier today to say that all the places are full already. Microsoft will be running another session at some point, so if you missed this opportunity there will be another sometime in the coming months.
In the meantime if you want to get your feet wet and have a go at speaking for a short 5-10 minutes session we always welcome new speakers at Scottish Developers. Just drop me an email to colin@scottishdevelopers.com. We also have an open mic night from time-to-time so drop me an email if you'd be interested in that.