sky, i think its the dynamics that are required to run a full fledged database driven site on a mobile app. just as you know and have stated, dolphin itself is resource intensive, and thats on wired devices. trying to accomplish the same thing on a mobile device, i.e. phone is not feasible at this juncture. it would require an intensive rewrite to get the entirety of dolphin to go mobile, and even then, not sure how applicable that could be. most web ready are written in different languages than what dolphin is written in.
i went to look at one of the sites i frequent regularly, and there m site is a stripped down model of their web app (site). http://nascar.com
of course my phone is not just internet capable, it is an android, and you would have to consider the screen size(s) variances that you are referring to, and there is no way, or at least i wouldnt want to try to accomplish it, to write something that would be compatible fully with every phone that is internet capable. you are not going to find many sites that are viewable on a mobile device to be as fully functional as their web based app (site).
a phone app, its more of a convenience, and in most cases an online mobile presence is just that, nothing more than a calling card, with some generalized contact information.
"Any publicly-visible content could be pulled into the mobile format by mobilitee. Think of the actual mobile app as just a container into which content is pushed by the included php proxy script. Images should be automatically resized (via CSS) to fit the mobile screen, but you'll probably need to add your own bit of CSS styling. If I were you, I wouldn't attempt to pull in the entire page (i.e., everything between the "body" tags, which is default), but choose the most informative and relevant parts. Also, please note that content grabbed by mobilitee will automatically strip any javascript script tags, so the slideshow on the homepage wouldn't work unless you actually added that slideshow's code into the mobile version manually."
this was from a guy who i had inquired about the same thing. i am also still looking into this, if i find anything, i will make sure you are the first to know.
BTW, what kind of phone do you use?
When a GIG is not enough --> Terabyte Dolphin Technical Support - Server Management and Support