I'm heading to the AlwaysOn GoingGreen conference at UC Davis tomorrow. This conference coincides with the first annual GoingGreen 100 list of hot private companies in the cleantech (a.k.a. 'greentech' according to AlwaysOn) space. The list is filled with some well known and some new entrants into the cleantech arena. On the often mentioned side, you'll find Tesla Motors, A123 Systems, Miasole, Nanosolar, SolFocus to name a few. These companies are clear leaders and well-funded in the space they are attacking.