Hmm. If you have perfect information as per the wikipedia article, the the most rational thing to do is to not take part in this auction at all. By placing a single bid, you are led into a series of rational sequential bids, leading to irrational bids subsequently. You know this in advance, so any bid is irrational.
In saying that ...
0.5112 btc ![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
It's like being in Alice In Wonderland. Your 5.1112 bid obviously doesn't fall into the definition of acceptability, so you aren't on the hook, sir.
38 minutes to go..