As I have stated before I am coming to ASP.net from the world of PHP. On an Apache server using the mod_rewrite to make your urls simpler is a hugely popular practice.

IE turning

www.example.com/display.php?id=3423 into www.example.com/3423

Is there an equivalent or popular method to do this in ASP.net on an IIS server? Thanks.

Check out this blog post:

http://weblogs.asp.net/scottgu/archive/2007/02/26/tip-trick-url-rewriting-with-asp-net.aspx 

 I started to use URLRewriting.net, http://www.urlrewriting.net. It is easy to use if you know Regular Expression, it is free and the documentation is pretty good.

You can use IIS Mod-Rewrite which is a quite accurate port of mod_rewrite. You can also find other similar resources at http://en.wikipedia.org/wiki/Mod_rewrite