ASP.NET and seo
We’ve started using HTTP Modules quite a lot recently for optimising links and making URLs more english-like than the http://…./productDetail.aspx?ProductGUID=8c66abc4-0197-4596-9b21-e5e40b4917c9 type convention you normally see on database driven websites. So using HTTP Handlers, a URL can now be http://…./A-sample-product.aspx instead.
For getting websites to work on the internet, attract visitors from search engines and be highly ranked, HTTP Modules definately are worth their weight in gold.