I'm also considering changing the release setup a bit. I'm currently using the bx postfix to indicate it's a beta release for a new upcoming release, but I think I will switch to increasing the middle number more often, so simply use 0.x.0 for the release, and then 0.x.y for the incremental changes. 0.x.beta-y will then be reserved for true beta releases in preparation for a full release. This would result in:
0.8.0 (full release)
0.8.y (y > 0, incremental changes on 0.8.0)
0.9.beta-z (beta release z for release 0.9.0)
0.9.0 (next full release)
Any thoughts?