Hey, I see Microsoft announced RSS Support in Longhorn; good stuff! The services they plan to provide (subscription list, data store, sync engine) sound pretty plausible. As for their list-control extensions, it’s up to the implementors and the market to decide if they’re useful; they look like they won’t break anything, so the experiment is free. I’m somewhat amused by the last paragraph’s “We will support Atom 1.0 when it’s released.” That will be in the next few weeks, which is to say at least a year before Longhorn is.