Here's one users first impressions (who also has a Kindle):
http://www.pvponline.com/2010/04/05/...ons/#more-5518
So.... cool device. Kindle replacement? No way. Supplement? Sure.
Another thing to keep in mind - the IPad has a glossy screen (so you'll be looking at your face and whatever else is behind you while you read) and will be pretty much *completely* unreadable in bright sunlight. The iPad also looks to be *very* fragile:
http://www.pcworld.com/article/19338...ess_tests.html
PC World found that the screen was permanently damaged with just 3 drops on carpet!