LAST EDITED ON Feb-20-06 AT 05:35 PM (PST)
 
http://www.websiteoptimization.com/services/analyze/ (great to see if pheeds are hanging)
More blog search engines: (I'll add to Official thread)
http://www.blogwise.com
http://www.backwash.com
http://blogdex.net
http://www.blogsearchengine.com

The main use I've found for it, is that it lets you publish your feed as either RSS or ATOM, without worrying about conversions. Which is very useful for different syndication programs. You can also control the way people view your feeds, if they decide to view it in a web browser.

http://www.feedburner.com

hope some of you bombers will find this helpful.
This application can be used to turn a RSS feed into a javascript you can put on any of your HTML pages to generate live page news or article updates.
http://www.10001press.com/rss/build.php

The w.bloggar is an application that acts as an interface between the user and one or more blog(s). It is a Post and Template editor,it runs over the Windows GUI, it allows the user to edit posts without being connected to the Internet. Posts can be saved locally, one click will post it to the weblog, and it is compatible with most of the weblog systems available.
http://wbloggar.com/faq.php#243

http://blogsearch.google.com

Here's a couple of ping services:
http://kping.com/pings/ping.php
http://pingoat.com/
One more:
http://pinger.blogflux.com/