Looking at the list, I noticed:
- 13% of the companies in the list are mobile (thanks to the iPhone!). For example, there is AdMob, which is a cool company. Some of the others are mobile play but they do not know it yet: for example, Jajah (believe me they are a mobile play)
- 5% of the companies in the list are open source, such as rPath, MuleSource and others.