Techcrunch 50

Techcrunch50 is going on currently. There are a three email related businesses that have been pitched.
AdRocket: Technology to insert contextual text ads, on a per subscriber basis, into existing newsletters.
OtherInbox: A service allowing individuals to have their own subdomain for email, and an endless supply of email addresses at that domain.
Postbox: A new way to organize, manage and annotate email.
EDIT: Comments closed due to excessive spam