I've been using Vipre Mobile (http://www.vipremobile.com) from GFI, the same people that sell Vipre for the desktop and server world.

Has several nice features built in:
Backup (apps, contacts, data, pictures, videos, etc...)
Find misplaced phone (sends loud alarm sound)
Find lost phone (uses GPS)
Secure Remote Wipe
Monitoring (useful if you want to see what your kids are doing, or for compliance purposes in the business world today)