The question is will the current iPads work with just a Sim change or will you need a Verizon compatible iPad????
You will need a new iPad. Verizon uses CDMA technology now and is moving to LTE for 4G data speeds. Current iPad uses GSM technology (which most of the rest of the now world uses BTW).
I'm still not convinced we will see a Verizon iPad or iPhone in 2010. I think it is more likely to happen when LTE is rolled out in a large enough area (probably in 2011). Also AT&T is also going to use LTE for 4G data so it makes sense to me that an LTE capable iPad that will work on Verizon and AT&T may come at some point. By then we will all be looking to buy 2nd (or 3rd) generation devices anyway.
The Boy Genius report could be based on Apple building test units for the LTE network, but not planning on mass producing them until LTE is widely available, but you never know.....maybe we will get some answers at the June 7th meeting. If Verizon is annouced for iPhone at that time I think a Verizon iPad will follow shortly.