I think its great. I run a competitive video game community, and I've seen many others. Something that is pretty universal in tournament communities is that "old" members always look down on "new" members. They use the information in the postbit; registration date, post count, rank, etc as ammunition against new members. By getting rid of the extra information, this would limit that.
Of course, I will still be adding fields for PSN and XBL usernames, with popout gamercards.