Google Previews New Search Infrastructure

Google has announced a "developer preview" of a new search infrastructure, though one wouldn't have to be a developer to try it out. Google is asking for feedback on how the search results in the new regime stack up against the old. Matt Cutts has posted a mini FAQ. Some early testing indicates that the new search may be faster in some cases, and return more relevant results, than the old one. Those who attempt to game Google search for a living will be scrambling henceforth. Has anyone identified the new crawler bot in log files?