Acid, I'll keep an eye out for it. Handy thing with the text to speech programmes is that you can record all your sound samples to get a mission working OK, then if you can find some people to do proper voices you can over-write the files.
Speakonia seems very good. Although it sounds a bit like Stephen Hawking at times, it's actually not as monotonous as you might expect and has enough different voices to cover a few characters. I wonder when support for proper Brit English will come out - Scots, Welsh, Scouse, Brummie, Cockney, Zummerzet....
Ade