Here’s the most up to date listing of advisory and investment portfolio. Most of it is done through my investment company, Frequency Capital, LLC.

It’s a diverse group of companies – all are early stage. Some earlier than others. The common thread is that they are all companies that intend to transform the fabric of the Web – making it more understandable, more real-time, more profitable and more social.

Investor in Twitter (via the Summize acquisition) Short message life stream service

Advisor to OpenCalais The Web’s first open semantic service

Advisor and shareholder of Outside.in A local service that tracks news, views and conversations at the town and neighborhood level

Former investor and advisor to Summize A Conversational Search platform acquired by Twitter

Investor in Stocktwits “Real Investors. Real Ideas. Real Time.”

Investor in Challengepost A public marketplace for contests and challenges

Investor and advisor to iBelong.com An enterprise social media platform

Investor in Tweetdeck – The best Twitter app IMHO