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

http://blogengineextensions.codeplex.com/SourceControl/PatchList.aspx

Matti Lehtinan explains how to improve blogengine.net for SEO

http://www.mattilehtinen.com/blog/post/SEO-Blog-Engine-NET.aspx

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.