As discussed by Sam Whitmore (http://www.samwhitmore.com) on TwiT (http://twit.tv/235), Wordstream is a utility that allows you to enter a term and determine what other terms appear next to it in a search. Not sure how effective/useful it is?
BlogEngine.net SEO pack available for download from
Matti Lehtinan explains how to improve blogengine.net for SEO
Microsoft has released an SEO Toolkit Beta – downloadable for free through the Microsoft Web Platform.
The IIS Search Engine Optimization (SEO) Toolkit makes the site content more search engine-friendly.
It requires an IIS7 enabled computer to run which is basically Vista, Windows 7 or Server 2008. After that it can analyze any local or remote website.
P.S. Besides standard installation, SEO Toolkit can be installed easily using the Microsoft Web Platform.