For me it wasnt the apps not working(xept avantgo) but the whole thing feels wrong specially the zero configuration is great for people who want to steal WIFI or just use DHCP. For people who actually have specific needs the 2002 drivers for most cards offered you options that 2003 just doenst. The 2003 drivers for most card now come in a way so WM2003 take full control of the net options, which is not many options to begin with.
I dont understand why in hell didnt MS made the network easier like it is BUT with enough substance to let people enter their own info for the networks. Example, add a wireless network options and it will ONLY let you enter if it connects "To Work" and "the internet" which are LAAAAAAAAAAAME options. Since there is really not much difference. Why in heavens name didnt they learned from 2002 drivers that let you make network profiles so you can select where are you connected I dont know. I mean was it sooooooooo hard to make it so you can have something like this:
WIFI network "NETWORK NAME" found. This network is new. Please select the profile to use:
[ ]Auto Configure

DHCP)
[ ]Profile 1
[ ]Profile 2
[ ]Profile 3
Where the profiles are profile the user has made before hand. This way they would have covered both bases, the "I cant configure a network if my life depended on it" people and the "Dang it I want it configure LIKE THIS you stupid piece of software!!!!" people.
Top it off with no ability to use keyphrases for WEP(only entering the full and its stupid, I mean really if they REALLY wanted to make it easy for people to join a network they should have made it easy for peple to join PROTECTED networks too, not just DHCP and off you go networks.