To have birthdays show up on intelliscreen (and in iphones calendar for that matter) all one has to do is go to the calendar preferences on his mac, turn on \"show birthdays calendar\", resync and voilla :)
Here\'s an article with a screenshot http://tara.teich.net/archives/birthdays-on-my-iphone (Thank you Lajcik for submitting this)
How do I show Contact Birthdays in IntelliScreen
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