The Apple way to deploy iOS devices from their enterprise support:

iOS Deployment PDF 3.2: Download file "Enterprise_Deployment_Guide.pdf"

iOS Configuration Utility 3.1: Macworks Server/Software/Apple/iPhone

The conifguration utility allows you to create a configuration profile and set the follows settings: Passcode Restrcitions Wi-fi VPN Email Exchange LDAP CalDAV CardDAV Credentials SCEP Mobile Device Management Server and more.

Third Party Options that allow for a more advanced setup and management with other smart phones and over the air enrollment:

Mobile Iron – tracking applications more security options selective wipe self-service app with enrollment roaming controls and device management. No pricing information but a calculator on the website.

Air-Watch – very similar to Mobile Iron – 60 Day Free trial and pricing: Download file "awpricing.pdf"