I'm curious if anyone out there knows of a tool or service that can serve as a unified inbox for email, Facebook messages, Twitter mentions/DMs, text messages, IM, etc?
I've always wanted something like this but I'm not sure if the problem just applies to me or if someone else has solved this problem already.
However, you raise a good point - a nice cross-platform solution for desktop use would be a great thing to have. It's kind of odd that it's been done so well for phones, but barely touched for desktop.
One problem related will be the constant influx of 'services that may be interesting', with disparate APIs - any solution should have a good plugin system.