1) You are intertwining your MARRIAGE with work. Rule #1 is don't shit where you eat.
2) You make matters worse because your husband is your boss. This will screw up the relationship dynamic, and that's not necessarily a guess, Im 99% certain it will be hard to separate, especially with longer start-up hours. Good luck, you'll need it.
3) You are putting all of your eggs in one basket. Sure its convienent, but if the start up fails, you are BOTH out of work.
4) Putting all of this on the company blog, with screenshots of e-mail correspondence and even prices is very strange, and either you don't know what you're compromising by doing this or it is a veiled attempt at advertising compensation packages on HN.
Generally, I don't think you or your husband's strategy will play well for either one of you in the long run. Others have said your finances will be joint, so why does it even matter what you get?
Seriously, this is really weird. I'm sure you're confident it will work, but I know first hand that mixing friendship (and in your case MARRIAGE, jesus) with work is dangerous and rarely ends well.
Good luck. My opinion is you both have made a very big mistake.