Over the weekend, GvR invited the Python devs try out Rietveld (named after a Dutch furniture designer and architect), his new good review tool. It's derived from the other code review tool that Guido wrote at Google, Mondrian.
Anyway, it lets you upload patches from file URL or file. For the lazy, there is also the convenient upload.py script. Then you can see a side by side diff of the changes the patch makes. Reviewers (and this is where the real power comes in) can make line by line comments. It's really an improvement over looking between the review and the line numbers on your editor which may have changed since the review if you ask me! I hope eventually this can be integrated with the Python tracker.
Of mine, the range patch is there.