I actually haven't yet found any difference (other than performance) between safari-windows and safari iphone while developing my webapps for iphone.
Are you on a mac or a windows platform? I'll try to cover both.
I have been in a very short time frame ramping up my development resources, here's what I'm finding useful, there are others, some are free , other cost a bit.
IF THIS ISN"T in a sticky it should be...
1) development environments- aptana development environment, free and open source javascript/ajax editing, mini webserver for testing apps right on the iphone, navigation templates and wizards, incapsolates all the common javascript/ajax libraries. dojo, jmaki, adding php support, iphone on phone console debugger - windows/mac - can't live without.
http://www.aptana.com/
2) A good css visual editor -
On the mac this would be cssedit,
www.macrabbit.com, on the windows platform stylemaster is pretty good, Tried the trial but decided to stick with cssedit because I do a lot on my macs.
3) GWT, google webtookit, takes java code and converts it to javascript.
4) Firefox web browser with the firebug debugger plugin - lets you debug your web 2.0 applications, extract stylesheets from other applications, including iphone apps, has some of the features of cssedit, as it can "see inside" any javascript page, and modify a local copy with css on the fly. note: if you don't do something special to obsculate your javascript code, it is wide open, don't let the fact you can't see it in view source fool you, these debuggers are to view source is to an xray compared to an mri. In fact the cssedit function is called x-ray.
5) download the latest copy of webkit from the apple site, in addition to the latest libraries has some rudimentary debugging and x-ray tools.
6) resources
safari.oriely.com
for a monthly subscription you can read online any book or forthcomming book that oriely publishes. - can't live without, bit expensive, but also invaluable on my real job.
Ajaxian newsletter and website, Joe Hewit who came up with the web 2.0 clone of the iphone user interface, everyone seems to use, maintains a column.
iphonedev group at googlegroups.com
Sitepoint books and videos - cheap and up to date
IS THAT ENOUGH.....
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