Very nice! Preview rocks as well, great job guys!
Bytes exhausted is most likely due to a “bad” plugin, something else other than bbPress of course. Please see our Theme Reviewers List and see last couple of answers about that: https://lists.wordpress.org/pipermail/theme-reviewers/2012-March/008625.html
This was about the Theme, but it can apply to plugins as well.
P.S. Using bbPress on my client site and they’re on a shared GoDaddy hosting and bytes exhausted was never an issue and that’s because there are no plugins that “eat” the memory.
My 2c
Thanks,
Emil