Version 0.30 of Mono has just been released. Looks like they're making good progress. Yet another interesting piece of software to play with. Also noticed that an alpha release MySQL v5 is out which includes support for stored procedures. By v5.1, MySQL starts looking really good with support for triggers, views, constraints, etc.
Still watching to see when it will be viable to port Microsoft web apps over to Linux. Develop on Windows (with Microsoft tools) and deploy on LAMM (Linux, Apache, MySQL, Mono). Deadly.