It is the same thing. I created a similar tool for use on s60 (symbian) on several carriers in africa. Sitonmobile "packages" up the interactions with a web server into a series of compressed images and delivers it via mms where it can be replayed. It is obviously less interactive but works fairly well for web 1.0 content.
No, it is the same thing. Data is encoded into a static image format only in order to be transported by mms. The difference being that my system and hp's system packaged up a static route through the site so a large amount of ondemand processing was not necessary. It appears this is being done entirely dynamically per request which is an improvement but my experience tells me is not scalable.