John Butler mentions the "illegibility myth" that blackletter suffers from. I feel it's not just a myth, it's actually very much wrong, and this is based on my research into the true nature of readability. I was part of a panel discussion about the revival of blackletter during the ATypI conference in Leipzig (2000), and the following page on my site is an attempt at encapsulating my stance:
http://www.themicrofoundry.com/ss_fraktur1.html
Anyway, this isn't a preaching session, so questions, feedback and even opposition are highly valued.
hhp