According to Mashable, Microsoft will be moving into social bookmarking.
According to Microsoft Evangalist John Martin, the company is set to release a product called “Social Bookmarks” this week. The product sounds a whole lot like del.icio.us, and will initially be deployed on MSDN and TechNet, so look for it to be mostly hardcore techie bookmarks for now. Features include bookmarking (presumably via a bookmarklet), tagging, and a web-based account where your bookmarks are stored.
Social bookmarking as seen on sites such as Del.icio.us, Digg and Stumbleupon allow users to collect (or bookmark) their favourite sites online and share those bookmarks with their friends and others.