This simple USB charger uses 4 AA batteries, an Altoids tin, and some miscellaneous parts that will cost you about $30 altogether.
ZOMM® Wireless Leash Plus $89.99 - never forget your iPhone (alarms for 30-120 ft.) - Answer Calls, Auto-Dial 911, etc. #gadget #iphone
Android touch screens for home automation
Simple Home Automation with Logitech's Harmony One
Schlage Link Home Automation System