I've blogged before about the enabling features of Monorail and Active Record, part of the Castle stack. Another piece of software which is making my development life a pleasure is ExtJS - a collection of javascript goodies created by Jack Slocum and his team - and when these three things come together, watch that coding fly.... I've created a screencast in which I demonstrate how easy it is to build a paging, sorting, filtering, AJAX-powered grid using ExtJS and Castle, and you can watch it here. It's 20 minutes long but filled with goodness - and a couple of hacks (forgive me :). Don't forget to check out all my past screencasts too.
UPDATE: As requested in the comments, you can MonorailExt1 VS Project directory of this.