Best Social Bookmarking Button?

Which one of these is the best Social Bookmarking Button and why?

1. Addthis
2. Sharethis
3. Social Marker
4. OnlyWire Etc.

Great question...

Would be nice to know if someones actually split tested the results... my bet is the "share this" plugin would be the winner, it's what massive authority sites like wired and tech crunch use.. so that's gotta count for something... if anyones tryed split testing social bookmarking plugins I'd guess it was those guys.

Besides, youtube use it... so that alone makes it the most "familiar" to the average web surfer, which would PROBABLY make it the most effective in terms of bookmarks per visitor...

Ofcourse that just an educated opinion not a data driven result... your mileage may vary...

personally i have only tried addthis, i like it because you can customize it to suit your needs...

I'm also using Addthis, it's well designed and versatile. However, it would be really nice if somebody did a comparable test of tese four, I'd be happy to see the results.

http://www.addthis.com/ is best and they http://www.addthis.com/ because they served over 20 billion times per month.

You can also get automated bookmarking solution from http://www.socialmarketservices.com/