From a Bearded Iris ;)

Is there a reason you are looking for seeds? Bearded Iris are usually propagated by diving the rhizomes (roots).

Many (most?) professional and serious hobbyist iris growers are also hybridizers. If you are wanting to try to grow the next great cultivar, stop by and talk to one of these people. They'll probably hook you up with plenty of seeds. You could also check with your local iris society chapter. I didn't collect iris seeds this year or I would send you some.

Oh, I forgot, you could also check out the Iris Forum here on GardenWeb. I can pretty much guarantee someone there will help you.

Here is a link that might be useful: Iris Forum