How about https://glbse.com/asset/view/KRAKEN or coming Satoshi Dice pass through https://glbse.com/asset/view/GSDPT ?
GSDPT sounds interesting (growth low-risk company), but has no voting rights. It's the best I've seen so far. KRAKEN is too high-risk for me unless I have a hedge, and also has no voting rights.Could you explain why you think mining companies will fail? Miners should always, on average, be profitable. If mining becomes unprofitable for some, those with a low profit margin will be forced out, but those with a safer profit margin will be able to stay in and make profits.
I believe mining is in an extended bubble. Mining companies will become forced out by ASIC and low-energy mining. The majority of successful bitcoin companies are private and dont offer shares to the public they can buy.
A company that can raise money has the ability to be successful. Many large companies are public.A lot of mining companies have ASIC upgrade paths if you look closely. NASTY for instance should be one of the first to receive them from bfl.
As for companies raising money most countries now have strict rules about public offerings which is unfortunate and means only high net worth individuals are eligible to invest. It sucks. If bitinstant listed on glbse for instance the SEC would massively fine them.
I do not believe mining is ever going to offer the rewards they are now again. Competition is going up, subsidies are going down, and the entire industry is an arms race.
And someone will be selling miners those arms, right?
https://bitcointalksearch.org/topic/asicminer-entering-the-future-of-asic-mining-by-inventing-it-99497
ASICMiner doesn't really fit your criteria of not being a mining company, but it doesn't look like you considered them in your OP. They plan on selling ASIC hardware- I think they could be a viable competitor to BFL, but do your own research :]
