For Information on the laws and customs of the Mezuzah see:
http://www.myjewishlearning.com/life/Life_Stages/Building_a_Jewish_Home/Home_and_Community/Mezuzah.shtml. You can also see an interesting Cartoon Video explaining how to hang a Mezuzah.
For a story on a legal case about a Mezuzah see: http://www.myshtetl.co.za/media/expatriatenews/usa/texas-enacts-law-defend-mezuzot
Please write me if you are interested in getting together at the Dutchess County Sheep and Wool Festival in Rhinebeck NY for Shabbat Dinner.