do a better job at tracking different lines of code. Allow setting bookname in a rule. At the end of a conversion, any commits recoded against bookmarks are applied to the bookmarks in the repo. This adds another dimension to the codeline tracking features.
Expose max_rev as a command line option.
Add option to defer recording tags until all processing is complete. This is useful because hg will take the superset of all tags on all heads, rather than just those on the default branch. In repos that branch off from trunk, "hg tags" will show old, deleted tags.