Okay kids, here's Bad Uncle Leo's capsule review of iBetterCharge: Upshot? Great idea, crippled by NO DOCUMENTATION.
As you've read below, a number of folks have NOT been able to get this to work, or only got it to work via USB.
You MUST enable "Sync this iPhone/iPad/iPodTouch via WiFi" by plugging your device into iTunes, checking the little box and syncing. Otherwise no way.
Now.. did I read this on Softorino's website? NOPE. I had to Google it and found it by reading LIFEHACKER.
That's crappy documentation, folks. Crappy. Bad Dev no cookie.
Okay, that aside: This is a great idea, and the Dev needs to add a FAQ to their site about requiring iTunes WiFi (or network, actually) syncing. As in, if WiFi syncing works great for you, this app will. And if it doesn't... well... you get the idea.
5 stars for a great idea. -1 for NO DOCS. -1 for dicey WiFi sync, dependent on iTunes... but if you're not affected.. give'em a star.