I have a fresh install of 10.10 and I am experimenting the disabled wireless 
problem as well.
But, on my Dell Vostro 1720, I cannot change the state of the rfkill using 
unblock all. It remains blocked. 

On the other hand, the wireless IS working as using wicd works just
fine, where NM fails.

sudo ifconfig eth1 up does not report any error works

dan...@daniel-vostro-1720:~$ rfkill list
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: dell-wifi: Wireless LAN
        Soft blocked: yes
        Hard blocked: yes
2: dell-bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: no

No change after sudo rfkill unblock all

The chip is a broadcom 4322, but this seems unrelated. Looks like an
interaction with the BIOS killswitch info. There was a similar bug which
affected Dell laptops that was raised against Lucid  : bug #430809

-- 
Atheros AR928X not connecting on wireless HP G60-468CA
https://bugs.launchpad.net/bugs/644452
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