Hey dschreib, since no one has responded to this yet, I thought I'd jump in. And as a bonus, I'll provide three versions of the same answer, depending on how much detail you want. ;)
* The really short answer is 'No'.
* A slightly longer answer is that, no, there isn't the exact equivalent. However, you can get estimates of the Max CPC needed to put you in your desired position by using a tool known as the Traffic Estimator. This is available several places from within your account, if you have one, or as a part of the sign-up wizard on the AdWords homepage.
* An even longer answer is that, no, there is not a direct way to research max bids for AdWords keywords a la Overture, because the two programs work on a different premise. Unless things have changed, on O, your position is determined only by your Max CPC (Well, that and match type). So knowing the Max CPC of your competitors gives you really useful info that can put you in your desired spot.
On the other hand, in AdWords, the relevance of your ads to Goggle users (as measured by CTR) is equally factored into an equation that determines your position. So, in this model, you can appear above someone who is paying more than you are, if your CTR is particularly good.
So, for this reason (although many on this Forum will argue the point) knowing your competitors Max CPC is not highly useful information. (IMO, that is.)