Jeff,
We all whine, and anyone who doesn't want to hear just has to leave your thread.
Dry mouth is one of the issues that unfortunatly is common place during and after OC and H&N cancer treatment. There is lots of good info and tips on how to cope with it and many references to products others have used on this site.
Coffee...Mmmmmm coffee....unfortunatly it is a diuretic and removes water from your body. May I suggest finding a good decaf coffee from a good source such as Starbucks or other chain....same great taste with 99% of the caffeine removed. Stay hydrated...drink lots of water and I mean lots...if this doesn't appeal to you try tomato juice V8 etc. they will help keep you hydrated and also have nutritional value. Eating plenty of fresh fruits and vegetables and limiting salt and MSG intake will also help in reducing dry mouth symptoms.
Biotene makes many great products that will help reduce the dry mouth issue.

If I can be of any help just ask.
Keep up the positive attitude and whine away.

Cheers,
Mike