iPad without 3g is a brick outside the house or not in WiFi area. IMO, your crazy not to get the 3g version.
Not sure where you live, but I've found it rather easy to find Wifi with my laptop. I don't drive and use my laptop, so upon exiting anywhere i the metro area, within a few blocks I have a hotspot. I hardly consider my laptop a "brick" outside my house. I login to to my corporate network all the time on the go. The past 2 or 3 years it's been tough to NOT find Wifi available. Hotels, motels, McD's,, Bookstores, any number of restaurants, bars etc..
Not to mention I won't be paying for yet another data plan when my iPhone already has one. Tether and go imo. If i'm in such a remote area I can't find Wifi, which has not be the case for me over the last several years, jailbroken iphone/adhoc network to the rescue. Screw ATT for trying to suck yet another data plan out of me. Won't happen.