Onlywire isn't the only site out there doing this. You could also try
Social Marker and
Social Poster.
I have to say though, you'd be better off waiting until the 30DC before you start getting into services like this. Not only due to the tool we'll have, but also because not all bookmarks are created equal. Wait for some guidance on how to use bookmarking services effectively and efficiently.
Cheers,
Nez