Just stumbled on this thread and thought I'd say hello! Yep I'll be 70.3 next year with a view to qualifying for WC. Qualified this year in Antwerp but couldn't afford to get to Vegas so will target next year. Unfortunately Antwerp lost their WTC license so there will be no repeat for 2013. I'm looking at wimbleball and Pays d'aix at the moment.
I've done a few IM full events, and whilst they are great fun, they take up a shed load of training. 70.3 is a great distance and very doable for anyone of marathon fitness. One tip is get on the bike often, it's the stronger cyclists who tend to be able to run fast afterwards. Good luck with all the training, look forward to hearing how it goes.
Cheers