these share prices... wow! i should have bought more last month

Yeah .... I though they would remain stable around 0.30 but I guess once a bit of buying started, the panic buying followed right after ...... let's see how it plays out now
I think some people just try to pump and dump, taking advantage of the out-coming tape-out. Even the tape-out is successful (most likely someone has already got some insider news about the progress), the current price is still way over-priced in my opinion.
No it isn't. The value of a stock is based on all future dividends, discounted by risk and some penalty for future returns being worth less than money today.
What is going on in the next two months for asicminer is totally irrelevant.
I agree with you way to calculate the value of the stock, but I don't think AM has any chance to generate dividends of 0.6 BTC in the future. Another 0.6 BTC means AM has to generate more than 240K BTC in the future. Considering there're only 9M bitcois left, it means AM has to get more than 2.6% of the rest BTC. As a mining dominated company, that almost means AM has to keep 2.6% of the network hashing rate all the time (costs have been completely ignored here), not matter how fast the whole network hashing rate increases.
You may say, there're other revenue besides the mining/selling chips/franchising, such as immerse cooling. Those revenues, however, are in fiats and considering the appreciation of BTC in the future, revenue in fiats can be safely ignored in my opinion.
Finally, even AM achieves the objective, what's the point to spend 0.6 BTC and wait for the 0.6 BTC be returned in dividend in the following years?