Web 2.0 Sites Need Better RSS Integration

A very neat feature that jaiku and tumblr both have is that you can import your RSS feeds and have anything posted to them appear in your jaiku updates or tumblr blog.

This is something that EVERY web 2.0 community site should have for their users' page/blog/profile or whatever they're calling it. It's pretty odd that Facebook and Twitter don't have this by now.

Are there any other Web 2.0 sites that do it? Do you use this feature on the ones that do? If not, why? Please share your thoughts in the comments.