I wonder how many users are utilising link and site sharing services more broadly than the few I see sharing predominately by using the Facebook "like" button... There are sooo many site and services to even begin in this short post, but beyond the other medium I commonly see people I know on, which is largely limited to Google services such as Buzz.... One I do like it Stumble Upon... you can share sites you like under key words which are then also used to share sites others find which maybe of interest to you... I wonder if anyone else commonly uses it... ??
My StumbleUpon Profile can be found at: http://www.stumbleupon.com/stumbler/jezzieann/