Hi Bob! I'm sorry to hear about your brother. I was disowned by my great aunt back when I went from Catholic to Episcopalian (on my gradual progression toward atheism). Actually, she went ahead and disowned my whole family because of me. It's always a shock when someone who you assume loves you informs you that religion takes priority over you.
I guess my advice is to just keep being the better person. Tell him you love him and will always be his brother no matter what either of your religious beliefs are. If he cuts off communication, send him a card on his birthday and at other appropriate times, with happy wishes and no mention of religion or his lack of communication. Even if he never comes around, you'll know that your rift wasn't your fault and that you were always a good brother. Or maybe he'll realize that he's being a jerk when he sees your continued kindness.
Maybe you weren't looking for advice, in which case, please forgive my presumptuousness and accept my moral support.
Hey, I like your very Wisconsinesque picture. I'm a fan of biking too - I bike to work to reduce my carbon footprint. 27 times so far this year! Good times.