Your post is confusing. The way it is written, it sounds like you decided you wanted to have an IPO and so needed to come up with a business idea to sell. This is the opposite of what should be done. Traditionally one would have a business plan first and if additional funding was needed in order to achieve one's goals then a public offering would be one possibility to raise those additional funds.
He's only gauging interest right now.
I personally would invest an amount into it, but I don't know how much.
Perhaps you could set up your IPO at Havelock investments. Potentially, this could be the next asicminer in terms of returns, so I will invest a small amount into it.
Gauging interest in what?
"I've wanted to do a publicly traded company for some time and thought a datacenter / hosting facility would be the way to go. "
He doesn't even know what he wants to do. He might be trustworthy as an escrow, but as for investing in him, would not suggest. It sounds like Maidak wants to have a publicly traded company more for entertainment value than for anything else.