What is claimed is:1. A rack for supporting a plurality of computing devices, the rack comprising:a plurality of planar shelves, wherein each of the plurality of planar shelves has one or more positions for holding a computing device of said plurality of computing devices; andan air barrier affixed to the rack and having an opening for each of said plurality of computing devices to exhaust hot air through;wherein the rack is configured to be connected to other racks to form a vertical geometric prism;wherein each of the plurality of planar shelves is offset vertically from each other; andwherein the plurality of planar shelves form a helix.2. The rack of claim 1, wherein the helix is configured to create a vortex within the vertical geometric prism from air drawn into said plurality of computing devices.3. The rack of claim 1, wherein the helix is configured to create a vortex within the vertical geometric prism from air exhausted by said plurality of computing devices.4. The rack of claim 1, wherein the plurality of planar shelves are annular sectors.5. The rack of claim 1, wherein the plurality of planar shelves are trapezoidal.6. The rack of claim 1, wherein the air barrier forms an inside surface of the vertical geometric prism.7. The rack of claim 6, wherein said plurality of computing devices are configured to exhaust the hot air into an inside of the vertical geometric prism.8. The rack of claim 1, wherein said plurality of computing devices are positioned to exhaust the hot air at an angle relative perpendicular.9. The rack of claim 1, wherein the vertical geometric prism is a rectangular prism.10. The rack of claim 1, wherein the vertical geometric prism is a cylindrical prism.11. The rack of claim 1, wherein the vertical geometric prism is tapered.12. The rack of claim 1, further comprising an air duct configured to deliver air to the bottom of the vertical geometric prism.13. The rack of claim 12, further comprising a fan connected to force the air through the air duct.14. A system for cooling a plurality of computing devices in a data center, the system comprising:a plurality of shelves, wherein each of the plurality of shelves has a plurality of positions for holding one or more of said plurality of computing devices;a cylindrical air barrier having an airflow opening for each of said plurality of computing devices on the plurality of shelves; anda plurality of supports configured to hold the plurality of shelves in a vertically-spaced arrangement forming a helix inside the cylindrical air barrier.15. The system of claim 14, wherein the helix is configured to form a vortex from airflow created in the cylindrical air barrier by said plurality of computing devices on the plurality of shelves.16. The system of claim 14, wherein said plurality of computing devices are configured to exhaust air to an outside of the cylindrical air barrier through the airflow openings.17. The system of claim 14, further comprising an air duct within the cylindrical air barrier delivering cool air from above the cylindrical air barrier to the bottom of the cylindrical air barrier.18. The system of claim 17, further comprising a fan connected to the air duct and configured to force the cool air through the air duct.19. The system of claim 17, wherein each computing device of said plurality of computing devices comprises one or more cooling fans and one or more temperature sensors; andwherein the system further comprises a management server connected to the computing devices via a network and configured to dynamically adjust each of the one or more cooling fans of each computing device of said plurality of computing devices based on readings from the one or more temperature sensors.20. A rack for supporting a plurality of computing devices, the rack comprising:a plurality of planar shelves, wherein each of the plurality of planar shelves has one or more positions for holding a computing device of said plurality of computing devices and is an annular sector or a trapezoid; anda plurality of vertical supports configured to hold the plurality of planar shelves in a vertically spaced helix-like arrangement;wherein the rack is configured to be connected to other racks to form a geometric prism with an internal helix formed by the plurality of planar shelves.