[Lizard]

1) Flipping Priority: nope, but we're thinking about it
2) Resources in Weeks: Sorry, I'm a little unclear what you're getting at. The time scale for the resource view can be adjusted by clicking the magnifying glass in the upper right corner. The pink/green/blue bar graph of resource utilization is more fine-grained (minutes maybe?) and can't be adjusted.
3) Customizing resource coloring: nope, interesting idea. I'll add it to our request list
4) Undo after leveling: We've fixed a few cases of this, I'm not surprised there's more. Please email the files to us if you can.
5) Import time worked on task, by resource: Not particularly, but this would be a pretty straightforward AppleScript to create. Let me know if you need help with that. (It kinda has to be a custom script, otherwise it would have to know about several time-tracking apps.)
6) Internal/private milestones: nope. I'll add that to the feature requests.