I am sure the battery and charger are included in that offer.
I considered buying that camera a few months ago as it got great reviews as Zoë mentioned. Still considering it but I want a faster autofocus in live mode so I can have a full use of the tilting screen.
Get indeed a large memory card since you can also take HD videos with that camera!
I believe for a little more than the 18-200 you can get a 70-200f4 which is a great light zoom with a constant f4. It is not as convenient as the 18-200 as you would miss the wide angle (but there is no big distorsion and it is a faster lens).