By far the best online webshop and website from a bike dealer/producer I have seen so far falk bikes from berlin. Nevertheless they could improve there stuff by working with social media sharing and bookmarking tools, e.g. sharethis, to help people share and refer people to them. I am sure the croweds shopping at falk (based in Hamburg and Berlin Prenzlauer Berg) are very addicted to media and computing and some of them will have blogs or twiter for sure. Another idea to boost sales and to increase the word-of-mouth power of the internet would be a partnerprogramm. My recommondation (as always) netslave.de.