+1 for changing the icon based on the primary location. I want this feature much more than location-awareness. (Jailbroken iPhone has icon-changing weather app)
Since the app bundle is signed, and the icon is inside the app bundle... no, but Apple can cheat for their own apps: Calendar's icon always shows today's date. Clock and Weather could update continuously too. For third party apps, I'd like my stopwatch to keep updating it's icon in the background, and one of my apps could do with it too.
A more serious problem is not being able to update Default.png, so if your app loads the last view the user had, it's hard to make it seamless.
Definitely seems like a no-brainer that Apple forgot. Does this request means that the weather will get current location and update temp. when the app is opened? Or a dynamic update as you move along - I mean if this is the case, I'd love to have it while driving along and get weather updates for the route.
I expect it was omitted just like copy and paste were omitted so they could get it right. But the squeaky wheel gets the oil so they haven't done anything about it.
I've wanted this forever. I made http://geoipweather.com/ for my own use but GeoIP's (free) database is pretty bad, and damn near useless when using AT&T proxy servers via 3G.
There are plenty of other problems with this app. It is 2:49 AM EDT on Wednesday as I type this yet the app is showing me the forecast high/low for Tuesday on top.
Unless you put your iPhone in a place where body heat can't warm it an an electronic thermometer is pretty useless. Most mountaineering watches (Suunto & Co) show the correct temp. only after 20 mins. or so. And that's without taking into account the heat the device itself produces, which may be non-negligible for the iPhone.