You are not aware.
You download a webpage every time you visit it. Web apps and downloads do belong in the same sentence.
I am not "aware"? Yes, technically speaking, a web page is 'downloaded' when you view it. But when referring to web apps, nobody ever uses the term "download", you use "download" when referring to native run apps.
For example:
I installed Microsoft Office (from a CD)
I downloaded OpenOffice.org (from their website,)
I run Google Apps (from their website.)
I do not "download" Google Apps in the same manner that I "download" OpenOffice.org
iphone can not save pictures from a website. you can not make copy & paste and you do not have access to the folders of the phone. it is locked and you can not install new apps. and why? because the phone has to be simple to use, not confuse the poor user etc. when jobs introduced the iphone he said that it is a small os X computer. but what is it really? has anyone EVER let os X software run on it? nope. because it isn't an os X computer. maybe some parts of os graphics routines have been taken from the main OS, but that is as if bill gates would say windows CE is a pocket vista OS. however, back to the web-apps. i have an ipod touch and i was happy to hear about the web-apps. after 30 minutes of wasting my time with them i can say that this is some kind of joke. web-apps are very limited. you have to be online to let them run - even if you want to play a boring game. the graphics capabilities are very limited. you always have to let them run on safari, which means that you see the huge adress-bar on top and the icons on the bottom. if you want to access them, you have to go to your bookmarks etc etc. it is really terrible, the user-interface of these apps is bad (how could they be, they are html-files...), it is difficult to start the apps, they are slow, they are limited in what they can do and you have to be online etc. is this really jobs vision for the magic iphone?