That is an ugly permalink. Why aren't they running WordPress with more SEO friendly permalinks?

Because their blogging platform (and their site) runs on ASP.net?

Haven't worked with ASP.net in years, but afaik it's hard to do custom URL routing in it.

(Basically, ASP.net doesn't let you do things you can shoot yourself in the foot with, but that doesn't keep you from shooting yourself in the foot in the language: I remember running into an issue a back-end developer I was working with had with returning JSON from a webservice. We ended up wrapping the JSON in an XML document to make ASP.net happy)

It's not hard. With a tool like UrlRewriter.Net or similar, custom URL schemes are quite easy. And I believe the MVC framework for .Net has custom routes built in.

It would also look nicer if the script was in default.aspx instead of ViewEntry.aspx and the url was written like this:

http://www.woot.com/Blog/?Id=13420

It would look nicer still if it was lower case and they got rid of the dub-dub-dub:

http://woot.com/blog/?id=13420

IIS7 and above have URL Redirection built in... No longer need to do 3rd party custom stuff anymore.

Good to know - I haven't done any .net development in ~3 years.

I dunno, maybe they got sick of being rooted if they forget to patch their install twice a week.