You guys need to read the thread in my sig, and this one:
http://forums.androidcentral.com/general-help-how/33254-palm-webos-homebrewers-guide-android.html
Don't expect Android to do things the same way WebOS does, anymore than WebOS does things like iOS or Blackberry. Each platform is different, and you need to learn the platform your going to use, rather than trying to map it to something else.
Android already runs more than one app at a time, and you don't need any third party apps to make multi-tasking work. Start an app, use it for whatever you want. Then press the home key, and start another app. Do this as many times as you want.
Now LONG press the home key, and all your recent apps will be shown there. Tap on one you want to go back to, and there you are, right back where you left off.
Dust, most of us aren't going to be familiar with the kinds of patches you could do on the Pre. If you tell us what kind of functionality you want, we can probably tell you how to get it, whether that requires rooting or not. For example, if you root, you can run most apps in multi-window mode, not just those that are in the side bar by default.
And while we don't have Just Type, you might try Google Now, and say things like "Google, call Fred Smith."