Baez tried a high-profile case with an unpopular client, and he won. Seems like a good choice to me.
Is he 'notorious' for some other reason?
Always the contrarian. What other reason does he need? Of course the lawyer for one of the most notorious defendants in one of the most notorious cases of the decade, is notorious. Whether deserved or not, it's not my judgement, it is firmly established in popular culture. It was one of the most discussed trials of the social media age and spawned many dedicated forums and blogs, not unlike this case. O'Mara has already achieved a level of notoriety on several Trayvon Martin fan sites and blogs.
And as you recall, he was just mentioned in the most recent hearing and his response to the court is now part of the record. He acted properly in correcting BdlR's misstatements. However, many of the Zimmerman haters sharply criticized him for it, because of his notoriety and also because he now made a fool of their beloved prosecutor.