Hi John, the good thing about the new Springpad interface is that you can structure it any way you like. You could definitely use Springpad in a similar way to your use of Evernote, but I would encourage you to first explore the service as a means to organize what you find on the web (or on the go, if you have an iPhone or Android phone). That will help you get a feel for it and not be overwhelmed by any jarring changes to your workflow that will only turn you off.
If you aren’t too worried about that, then jump in whole hog and let me know how it works out! I’m finding myself increasingly interested in how our readers structure their workflows, these days. :D