Hi Runner.
First of all, congratulations on your visa!
After you are married, you do need to apply for a Further Leave to Remain Visa (FLR). This is valid for one year (or is it two now, they may have changed the rules recently), enables you to work the day after you get it issued, and won't cost you anything more now since you went the fiance visa route. You can apply for this as soon as you have your certified marriage certificate, and you can do it by post (which takes several weeks sometimes) or in person at one of the Home Offices around the UK (most people go to the Croydon one).
After the FLR visa is up, you will need to go back and then get the Indefinite Leave to Remain (ILR) by proving you and hubby are still married.
Again, congrats, and good luck with the next step in your journey!!!