Just signed up with ping-o-matic
This is a service that notifies the following feed syndicators that my blog has been updated:

Weblogs.com
Blo.gs
Technorati
Feed Burner
Syndic8
NewsGator
Feedster
My Yahoo!
PubSub.com
Blogdigger
BlogRolling
BlogStreet
Moreover
Weblogalot

This is actually a good list of feed search engines/feed agregators.

It will be interesting to see how this works!