Bronto Software offers 3 things to keep in mind when using Share-With-Your-Network (SWYN) links: are you shareworthy?, can you reward sharers? and are you asking folks to share in the right place? Twitter and Facebook may or may not be appropriate!
Bronto tries to stay on the forefront of online marketing given our work with email marketing. Of course, social marketing and its related sites play well into that. We have a presence in a number of places and use each "property" for a slightly different purpose. Here's a summary: