Why do I get phone storage is getting low when I've un-installed almost all apps? I keep getting "phone storage is getting low" constantly even though I've removed almost all the apps I've installed. Is there a way to look in the phone storage to see what are the contents? 

Google Talk and Facebook fail to function because of this. 

I have a Sony Ericsson Xperia Arc running Android 2.3 (Build 4.0.2.A.0.62)
Maybe because you haven't removed only the small apps that doesn't take significant space.

Go to settings -> Apps -> Select "All" on apps tab -> Click menu and click sort by size.

You'll see the apps sorted by the size it takes on your phone. Check if the top apps in this list are taking most of your space.