Twitters ads just launched in Canada and we just finished our first campaign for a hockey product client. The analytics are helpful. Friday netted the most impressions in our 3-day weekend promotion. The device analytics had iOS way out in front (not surprised) with desktop/laptop in 2nd (interesting) and Android in 3rd (slow adopters?).
In our ad configuration, Blackberry was not selected (can't even remember if that was a choice).
Can't wait to roll the dice again to see if we get similar results. I'm guessing that #MobilePresence is big for Twitter.