If you're going to deliver your hard-earned, approved content via the web, wouldn't you also want to distribute it via e-mail as well? Some CMS software packages offer some nifty e-mail broadcast features. But most do not, because it can be devilishly difficult to integrate with cutomers' e-mail, network, and CRM infrastructures, and because, well, CMS vendors haven't thought about it a lot or just assume that customers have other tools to handle this. The hosted CMS players, however, can provide e-mail publishing features with few encumbrances -- and they are. Atomz recently announced an ability for end-users to "subscribe" to new content. Clickability and Crownpeak have similar features...
Atomz     CrownPeak     Clickability