Links to user on bitbucket.org to user CNAME
It would be cool if links referencing a user or their items elsewhere on bitbucket referenced their cname'd host, rather than their directory on bitbucket (i.e clicking on my avatar on someones follow list should link to http://hg.lstoll.net , rather than http://bitbucket.org/lstoll ). And/Or have the directory on BitBucket 301 redirect to the CNAME, to help with SEO.
However the downside is that a user who has set their cname up incorrectly will experience lots of issues. It would be nice though.