Why are you worrying. IMHO (and if you read the financial press) the auction route is going to lead to one of two scenarios:
1. Small fry bidding too much to get their hands on the shares - then after float day, realising they have paid to much and dumping the shares at a loss - in doing so lower the overall share price still further
2. People not bidding enough to a. value the company as they wish, and b. to even get your hands on the shares in the first place. This will mean that you have to pay a registration fee etc (I am presming here) with no win at the end.
Finally the only other minor point is that unless you are US-based or resident, you can't get it anyways!
I think it's also very pertinent to look at the P/E ratios etc expected plus the overall vision for the company... they are very good in search, but this is a very fickle market where Yahoo and Microsoft also sit who have a better track record and more money.
Good luck if yuo do go for it, but I for one can do with all the hassle to overpay for 200 odd shares.