Google Wave also seems like it might be a solid scalable technology on which to build P2P streams.
I work on an open source meta-web project called ShiftSpace. The Google Wave server looks like the perfect backend for what we're working on.
Think of wave as a mashup of iGoogle and Gmail on steroids, with supreme customizability.
The recent explosion of labs in Gmail is a hint of what will be coming as developers sink their teeth into wave.
Disclaimer: I attended Google IO and saw the demo. I may have had some Google koolaid without my knowledge.
Use iGoogle. RSS+email. If that's too cluttered for your tastes, use Google Reader separately. In my system, RSS is for bulk while email is for specifics.
Twitter: RSS the feeds you care about, have personal tweets go to your cell. No more checking twitter.
Facebook: Use the mobile feature for things you really care about, and email for the less important things. They don't allow RSS for their news feed, so if you care about that... you're mostly out of luck :(
Bug tracker: Email + RSS. Works very well.
Hacker news: RSS.
Also, bonus tip for email: Your cell has it's own email address. Use filters to forward important email to your cell. The message will get chopped, and you will only receive who it's from, the subject, and a couple of words from the body. This reduces the amount of checking you'll have to do, since all the important stuff is taken care of.
What I meant wasn't "I have to check all these pages separately instead of checking iGoogle or FriendFeed". What I meant was "this could potentially be yet another communications channel for people to reach my eyeballs, and I'm sick of new communications channels".
More interestingly, given the fact that developers can write apps against the API, this may have a non-trivial intersection with social networking, meaning this could be a competitor to sites like Facebook, Myspace, etc.
Maybe the masterplan isn't to migrate everyone over from email, but to create a parallel world of Google Wave. Another inbox to check, in addition to email + RSS + twitter + Facebook + bug tracker + Hacker News. :-(