Yep, and when you use your iPad charger it will charge your iPhone MUCH faster.
I purposely bought the 6ft iPad charger for my iPhone. Will be nice when I get my iPad 2, but for now my iPhone 4 charges much, much faster.
I use my Macbook Pro charger... you pull the large block apart, pull the ipad charger bit apart and then plug the usb end of the ipad charger into the thick cord of the Macbook charger... works a treat =)