Web 2.0 is a really good name for the proliferating set of open consumer web services taking the internet by storm. One of the better descriptions of the phenomenon can be found here.
The "2.0" part of the name is quite fitting. Like most ".0" releases, it only sort of works.
I added Bloglet to my blog last week to allow readers to subscribe via email. I have posted a few entries since, but not a single email has been delivered.
No doubt this is partially just an illustration of the adage "you get what you pay for" (Bloglet is free). Still, for those of us who don't want to wait for Web 2.1, tolerance is a prerequisite.
Meanwhile, I've converted my budding email subscriber base from Bloglet to Feedblitz. Please adjust spam blockers accordingly.