As mentioned, there are plenty of discussions on Leaf specifics at mynissanleaf.com including pricing, incentives, lease vs own, experiences, etc.
I highly recommend a lease, as the technology is developing very rapidly and the lease deals CAN be great. Note that the advertised prices are just good...but not great. Many people are getting GREAT lease deals if you catch the dealer in the right scenario, I got mine for almost half the advertised lease price at the time, crazy cheap. If you buy, you get the $7500 credit with your tax refund. If you lease, the $7500 goes to the lease company, which is why the lease deals start below the expected amount and can get even better.
Absolutely do not get a Leaf unless it has a DC fast charger, it makes the car far more useful! We have an awesome infrastructure already in Oregon (and closely following in Washington), best in the nation by a good margin. We have really enjoyed taking road trips and vacations with the Leaf, it's a really cool change from the norm!
There are other good cars to consider, but mostly with caveats (general list for all areas and conditions for discussion sake):
Volt...Some great deals if you purchase a 2012 model, not many left out there
Smart Electric Drive...VERY cheap and nice to drive, just starting to roll out, NO DC Fast charger planned, and obviously not spacious
Fiat 500e...Haven't driven it yet, but looks good on paper and in the parking lot, California only, NO DC fast charger
Spark EV...awesome performance value, pretty small storage space, DC Fast charger still not available and uses a new type of charger that isn't available like the current Chademo/Leaf-style chargers
RAV4 EV...California only, no DC fast charger, a little pricey but great specs if you need a bigger vehicle
Model S...if you can afford it, you should already have one
The Leaf with DC fast charger is a very easy car to consider right now, given the options. It's definitely the best general-purpose option on the market right now and for the near-future. Personally, I wouldn't purchase a Leaf right now...that's why I opted for a 24 month lease. The 2013 has some nice improvements over my 2012 that do improve the value, so the price won't be as low as mine was. The darker interior color, available cloth, DC+6.6 kW charger option (instead of DC+3.3 kW charger) is better, the heater/air conditioning system is better, the weight is reduced, efficiency is improved, etc. Many minor improvements that make for a better vehicle. Like I said, the technology and cars are evolving quickly!
I recently had a bit of a revelation, about six months after Jessica and I both got an electric car. I don't think I will EVER have a "daily driver" again that is NOT a plug-in electric car. I could see a plug-in hybrid, but I can't imagine ever driving a normal gas or even a non-plug-in hybrid for daily use again. Sure, project cars burning dino juice will come and go, but for the regular commute I absolutely cannot imagine switching back. They just don't make sense to me after getting used to the EV...crappy HVAC, noisy, stinky, PITA to refuel, too much maintenance, and expensive fuel. I really like the EV daily, and I intend to branch out to try an EV racecar soon to see how that feels.
Bryce