Search Engine Optimization for your ASP.NET Dynamic Data Websites can be improved with more search engine friendly URL's. Awhile back Microsoft released the URL Rewrite Module for IIS 7.0 which among other things will help you with search engines:
“URL rewrite module provides a rule-based rewriting mechanism for changing requested URL’s before they get processed by web server. The module can be used to express URL rewriting logic that can use regular expressions or wildcards and can make rewriting decisions based on HTTP headers and server variables. While the primary purpose of the module is to rewrite requested URL’s, it also has functionality to perform redirects, send custom responses or abort requests based on the logic expressed in the rewrite rules.”
If you are interested in improving your website's search engine optimization, you can download the URL Rewrite Module for IIS 7.0 for x86 and x64.
As an aside, I wonder how valuable the URL Rewrite Module for IIS 7.0 is now that we have System.Web.Routing, which has the UrlRoutingModule and UrlRoutingHandler that are used in the ASP.NET MVC Framework, ASP.NET Dynamic Data, etc.