Tom Keating covered the FCC CALEA implications weeks ago - before Pulver's post. Pulver cites the same paragraph as Tom did with very similar analysis.

I'd check out Tom's post - lots of comments and feedback there as well.

http://blog.tmcnet.com/blog/tom-keating/voip/fcc-requires-some-broadband-and-voip-providers-to-accommodate-wiretaps.asp