This tool is really cool if you don't already know about it. If you don't want to log in to all of a your networks at once, you can know update all of them at one time using Ping.fm! - wiredgnome

I find this very useful especially if you have limited time on the web for some reason (i.e. traveling, at the library, ect.) - wiredgnome

They've even now have an updater for FriendFeed! - wiredgnome