A couple of weeks ago I was interviewed over the phone by Paul Gillin (his blog here), we covered quite a few topics I will be presenting at SaaSCon, from the need of rich clients, the emergence of SaaS hosting platforms, and of course maturity models :).
Here is the podcast. I believe it is a good 17min. investment of your time.
FYI: other pre-SaaS podcasts available here.