It may have been seven years since we lanched Blogger, but it's been one year (and a week) since we launched Odeo.
In the time since then, the podcasting landscape has changed quite a bit. Seems like I still come across new services on a weekly basis.
To get a sense of what other sites/companies are out there and what's happening with them, I wrote a roundup of podcasting sites based on the little data that's publicly available (Alexa).
I'll leave it up to your own interpretation. For now.