I'll add my +++ to these comments. I have LP+ now, after taking it off once and re-installing it. I don't know if it really makes a difference, but I recommend cleaning off your home screens before you install LP+. It zaps whatever you have and you start all over populating your home screens. However, if you un-install LP+, your original screens reappear, which means they are still there, somewhere in the electronic ether, while LP+ is operating.
I found, on my first install, there were lags and apparent conflicts with certain widgets that I had on the original screen and then again on the LP+ screen. Have had no problems since re-installing over blank screens on the stock UI. Outstanding app!!!
I also recommend the Extended Controls app which enables even further customization of basic operations at a convenient touch. This, LP+ and Vignette are the three best app investments!
Thanks to you all for answering the Froyo question. I, too, was wondering if there would be problems or duplications. Everything is running so smoothly now.