The creators of MyWi have just released a brand new feature for MyWi called MiWi OnDemand. What's this you say? It's an incredibly smarter way to create HotSpots that won't suck your battery dry and won't be active unless it's needed. MyWi On Demand is essential for anyone already using MyWi.
Having to turn on and off a hotspot gets old quickly when you're doing it all the time, as when you share your iPhone's 3G connection with a WiFi-Only iPad. Instead, MyWi OnDemand connects when you need it, and disconnects when you don't. When you leave your WiFi connection at home and you're using the iPad, the iPad will connect automatically. When you turn your iPad screen off, or go back where you have WiFi, MyWi OnDemand will disconnect. After a simple pairing, everything works automatically!
MyWi On Demand is compatible with 3G/3GS/4 iPhones/iPod Touches (3.1.2+) and iPad (3.2+). You must have purchased of MyWi 4.0 for this add-on.
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MyWi OnDemand - Connect iPad to iPhone Tethering