Taking a cue from Douglas Bowman's current move to MT(Movable Type), I figured out how to remove the ugly "default.aspx" from all my PermaLinks and archive links. The trick was a little inline C#, turning this:

into this:

== <% Response.Write(Regex.Replace("","default.aspx","")); %> ==

Nerdy, but cool. I like to be able to hide the implementation details (i.e. if I'm running PHP, ASP(Active Service Pages), ASP.Net, etc.) from my users.