HomeSmack allows you to easily switch between your Home/Launcher apps or your long-press-search apps and set a new default. Froyo supported

Also unlocks the Double-tap Home and the Long-Press-Search features on rooted Droid X & Droid 2

Similar to Home Switcher/HomeManager, but works on Froyo.
Replaces ClearDefaultHome.

Get HomeSmack Free: [ market link ]