For Samsung Droid Charge only, here's a Wifi Hotspot and USB Tether app that doesn't need root:
https://market.android.com/details?id=com.svtechpartners.wifihotspot
https://market.android.com/details?id=com.svtechpartners.wifihotspot
We've been tracking upcoming products and ranking the best tech since 2007. Thanks for trusting our opinion: we get rewarded through affiliate links that earn us a commission and we invite you to learn more about us.