I successfully used nicotine gun (nicorette and niquitin) for a short period as a complete replacement for cigarettes, however after only a few days my mouth was full of sores so I had to abandon that and go back onto the cigs.
I tried the patches, but they gave me a rash after a couple of days and didn't seem to be doing anything.
I tried the inhalator, but it just doesn't give you that hit like a real cig.
I have high hopes for e-cigs to get me off the smokes for good