My main experience is programming and I've finished a website that provides a fun way for people to read the news, vote and discuss the issues, and connect with other people with similar interests.
Could you share some of the effective ways to market it online to get more people to know about it? How to build buzz. How to get press coverage...
Pimping your stuff in forum posts and sigs like I'm doing above (hopefully tastefully) works. I would suggest you need to get over being shy about it and your first post should have had the URL. Also, track down anyone who blogs about your area (social news sites/poll sites) and contact them to let them announce you and or start commenting intelligently on their blogs.
Google will start bringing digg-like sites traffic based on your unique keyword combos after a while. I would post to some free directories to boost pagerank (but not paid links or directories) to help this happen sooner. There are also free forums for link announcements. These won't bring you much traffic directly, but google still is awarding some rank for the links and you will probably start placing for off-beat combos. I was getting google traffic for "huffing purel" for a while after a friend made a comment joking about that.
Google Analytics is a great tool. I suggest adwords to get some starter traffic. Be warned, my users were so lazy ( less than 1% post and almost none vote) that I started populating it using scrapers. They will lurk though and read your content. So if you get bored talking to yourself, try and build traffic fast. Avoid Adbrite if you do this--the traffic is worthless.
Anyhow, those are my tips...