Here is an ecosystem of companies that operte in the cloud computing space. I got the initial list of companies from a taxonomy created by Peter Larid. I added a few companies to that list and then created a database of all their alliances using information provided on their websites. Infrastructure companies are shown as triangles, platform providers are diamonds and service companies are shown as circles. Link colors denote type of alliances -- strategic (tan), technical (yellow), systems integrator (green).