There was an allergy clinic here in Denver that showed up in a story on the local news as one that gives out allergy drops. They're the same kind of antigen mix that is used for shots, but it can be self-administered, under the tongue! So no weekly shots. Less cost, and actually less hazard to the people getting the treatment.
The interesting thing is that they seem to be able to address food allergies as well as just airborne stuff. Woo...
Link for those interested. I'm not sure where else it's available, but it has some keywords that can be searched on in your area, too.
I'm likely to go look them up when I'm off my antihistamines...