You took the words right out of my mouth, Pete! But then it always is hard to beat you to the punch!

Commuting does go a long way to scratching that cycling itch, especially if you can supplement it with the occasional longer/different ride. Maybe your spouse will go on those other rides, or some of them, with you, on her commuter.

Maybe as some have suggested, you can point out the health and convenience benefits to her. Point to some out of shape person and mention that you might look like that if you quit. If it's done in a constructive way, she might see the light!

Some of you single guys should understand the fact that it's not always quite as simple as getting them to deal with it or getting rid of them (I also realize it may have been said somewhat tongue in cheek). Sometimes the cycling bug came along after the marriage, and there are always other circumstances to consider. There are many sides to a relationship.
Anyway Cyclezealot, good luck!!!