I have a one model that I some how modeled in a way that one polygon doesn't want to transfor to a valid triangle :| So I get the "list index out of range" error. This is not a big problem but I just wanted to mention that. I don't have a clue how I got the polygon there but all of my other models export VERY well. And ventilator, your script is the FASTEST export script that I have ever used with blender. Good work!

Btw you could e-mail to blender staff to get your script in to the next blender box. It would be realy usefull to me and as well many others.