Do you guys think it's a good idea to buy TSLA on day one?
Getting into an IPO on day one is usually not a good idea unless the company has reliable revenue and there is a reason to expect 20-30+% growth near term (Google, First Solar,etc). Many ipos will look like Clearwire (and for example, American Apparel, Isilon, and to some extent Rackspace etc.), a IPO price which stays steady then a significant drop.
Tesla won't have a reliable revenue increase until 2012 as far as I can tell, which is a long time of stagnation which the market will not take kindly too, IMO.