Hot tip from my pal Mike Vaughn, while I'm waiting for Skype to get it's act in gear for us working type audio folks, there's a potential alternative on the horizen to over priced ISDN, and under-adopted Source Connect.
eSession isn't really setting it's sights on remote collaboration, as much as they are wanting to be a one stop shop for casting, hiring, and producing voice performance (which just so happens to include remote recording).
I've not used their service, nor do I know anyone who has, but it looks to be an interesting project. Especially as no one has cornered the market on internet based remote production.
Check them out at http://www.esession.com/