How can I share cool things?

So every so often, I'll find a cool video/image/thing that I just want to share with EVERYONE on the various websites out there, in one simple click.

Specifically websites like:

- Facebook (which is pretty much supported by every sharing solution out there)
- Livejournal (which isn't)
- Dreamwidth (ditto)
- Posterous (no longer supports sharing to LJ)
- Tumblr (doesn't support sharing to anything!)
- Google+ (doesn't support sharing to anything!)
- Wordpress blog (has a whole range of plug-ins but seems like using a sledgehammer to crack a nut)

However, I've yet to find a one-click solution that'll do that for all the above websites.

Anyone got any ideas on how to accomplish this?