Warning: this is going to be of absolutely no interest to anyone but me.
If I post to del.icio.us, that ends up on my blog, which ends up posting it to my LJ.
Also when I post to del.icio.us, it ends up on my other blog on Tumblr, which then gets imported into my Facebook notes.
Posting directly to Tumblr eventually gets sucked into Facebook; posting directly to my blog gets sent to my LJ.
If I make a tweet on Twitter, it also gets imported into Tumblr, and from there into Facebook.
I’ve just now changed things to that instead of posting directly to my tumblelog, my posts on del.icio.us get aggregated only to my regular blog, and then that gets fed into my tumblelog. Meaning, tumbl.ariffic.com is now the endpoint for basically everything I post (and, by extension, so are my Facebook Notes). That anything ends up on LJ at all is pretty much a triviality at this point.
tl;dr: (((del.icio.us -> blog [-> LJ]) + twitter) -> tumblr) -> facebook.
This doesn’t even take into account services that I don’t have aggregated anywhere, such as: posts on Wowhead, RSS feeds of my Google Calendars, and things of that nature. I also have a feed or two that I haven’t made public, and a couple defunct blogs whose feeds don’t update because, obviously, I’m not updating them anymore. In theory I also have a blog on IGN and a blog on Destructoid but I just don’t use those. If I did, they’d probably also end up being pulled into Tumblr, simply because Tumblr allows me to import random feeds.
Oh, and posts I do on RE. But there’s not a lot these days; it’s pretty busy here, and I never think about blogging when I get home.