A desktop aggregator with good server tracking?

I haven’t fooled much with server based aggregators. I find the desktop ones to be more responsive. The problem with desktop based aggregators is that they (at least the ones I’ve tried) don’t provide an easy way to share subscriptions and items-viewed-and-closed information among instances running on different PCs. I want a desktop aggregator that can sync subscriptions and message status with a central server. Do any of the existing aggregators solve this problem?

And another thing. It’s too labor intensive keeping up with and deleting the flood of posts from traditional news sites. Wouldn’t it be great if there was a “delete all posts older than 1 day” feature?