Hopefully the techs at RIM had enough common sense to stand up a server that was clean and patched before they went live. If the launch with an infected machine they deserve what they get. The conficker worm update only affects machines that already have the worm. Those who aren't currently infected will be fine.
I would expect it around the evening when people are like getting off at work and stuff, cause why would RIM be having all these people updating their OS in the middle of the work day possibly getting them in trouble for being idiots and posting all over crackberry about what an OS is and all that good stuff. Ha so my thoughs are that it will be when everyone is setting at home... but i'll be at work till 10 tomorrow :/