I noticed a blog post on the Operations Manager blog today regarding the RSS feeds found on the Solution Center page for SCOM 2007.
I've been to each Solution Center page for the System Center products and consolidated the RSS feed links here:
Service Manager - No current Solution Center RSS Feed, but I've linked the Engineering Team Blog Feed
Virtual Machine Manager
Data Protection Manager
Opalis - No current Solution Center RSS Feed, but I've linked the TechNet Wiki Feed