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The smart thing to do is wait. Only four to five months won't kill you. If you already have an iPhone, the decision should be even easier. The ipad is nice but it's nothing you can't live without for a few months especially if you already have an iPhone. Too much overlapping functionality between the two devices.
The one noticeable difference between the ipad 1 and ipad 2, aside from the addition of a camera, will be the increased RAM. 256MB on the current ipad is clearly deficient. Yes, on the whole, the unit still runs smoothly, but it'll refresh webpages and drop apps in multitasking quite frequently. May not seem like a big deal at first, but it gets annoying (again, particularly if you have an iPhone, which has double the RAM).