Funny you mention Rahul today - I met him at the World Vaccine Conference in Washington in 2004 or 2005 - after buying my first shares in 2002. Remember Estrasorb anyone?
I was impressed with their vaccine production method of using 2,000 L bags instead of eggs to grow flu vaccine. But they had no product and no customers.
Today the situation is entirely reversed - a product, plenty of potential customers, and no freaking BAGS !!