I have done it frozen, Jeanne

I sometimes think a marinade is ideal for previously frozen meat, since the texture is somewhat damp anyway. What I do, though, is put the frozen meat in the marinade and allow to thaw completely in the refrigerator, which can take up to 2 days for a large piece of meat. They say that it is better to defrost by this method anyway, and the meat sits in the marinade a nice, long time.

Now, if I'm organized enough, I prefer to put marinade on the meat before freezing so that it soaks up as much of that flavor as possible.

Let us know what you think, if you decide to try it.
Thanks!