Image by Brajeshwar via Flickr
Well, the good news is that a lot of Venture Capitalists use social media tools to do their research and promotion. So your social media presence itself should help be on their radars by default. Also you can use search methodologies to find such opportunities and people and start following them. Participate in their communication to the start-up world.
Examples of tools to use for such an objective would include twitter and online services like Gist which enables stronger professional relationships from across the web giving you right information.
Social Media tools will help you make your pitch by way of creatively telling your story, allowing others to know your organisation, participate in the conversations, share your information with others and then becoming involved with you.
Nowadays people even talk about crowdsourcing funds and there are sites to take a look at.