For those of you interested in the challenges of wireless 9-1-1 service (and everyone should be since a majority of 9-1-1 calls in most jurisdictions come from cell phones), I offer you the following link to an excellent story on MSNBC.com:
http://www.msnbc.msn.com/id/31786185/ns/technology_and_science-wireless
The reporter accurately details the variety of issues that dispatchers deal with on an daily basis, and it's an informative read.