Big fan of you and Buffer. Thanks for the tip. I am actually focusing on that now. I don't have much idea about guess blogging, any tips on that like how to pitch a blog for guest blog?
Also he wrote an article for OnStartups about getting press, which might also be useful - http://onstartups.com/tabid/3339/bid/80121/How-To-Get-Media-...
Hope that helps :-) Good luck.