The SharePoint Web part for MOM is pretty cool. The WP renders a customized, filterable view of the MOM alerts inside a WSS site. Attached is the updated code that works with MOM 2005 SP1. Thanks to Mike Reilly at the Waltham MTC for the help.
I also love the Op Console notifier. It's a systray utility that pops toast when configurable MOM alert levels change.