Personal Allergy Forecast - Pollen.com's Personal Allergy Alert Forecast provides vast amounts of information on pollen and allergies for sufferers. Get a daily allergy forecast emailed to you. - http://www.pollen.com/
WeatherSmith - Air quality forecasts and related information for the southwestern United States - http://www.weathersmith.com/
National Allergy Bureau - Daily pollen/spore counts for US cities, including source-specific counts and alerts by email. - http://www.aaaai.org/nab/