RIPE 55 was last week, and apart from amusing songs (The Day The Routers Died) and talks about IPv4 exhaustion, they kindly put slides online. I found this interesting:
I linked a better recording and posted the lyrics over in my journal.
What current estimates did you hear regarding the exhaustion of the IPv4 address space?
Re:The day after
acme on 2007-10-29T14:50:51
There will always be IPv4 addresses available - but the price will increase until IPv6 seems sensible and is rolled out everywhere.