As well as two separate Bot widgets (for Contacts, and Shortcuts to applications), three other bots are provided that live in the main widget:
Profile Bot
Suggests profiles for you to change to, given the time of day and location, or it can handle the process automatically.
Alarm Bot
By watching your activity, Alarm Bot can work out when your profile needs to be silent (at night) and when the best time for an alarm call should be. This also means you can be sure your phone doesn’t stay on silent in the morning.
Battery Bot
Makes sure that at night time, your phone either (a) has enough battery charge to make it through to the morning or (b) suggests you plug your phone into the charger.
There’s more on the update here, and the home of the Nokia Bots is at the Beta Labs website. And just to be complete, here’s Rafe's piece on the bots, and a short video on the Bots from their launch earlier in the year.