I started writing a Bazaar client this weekend. After two days, here's what I've got:

Currently supported features are:

• Init
• Commit
• Add
• Pull
• Merge
• Push
• Commit
• Merge using an external merge tool

I've only tested it on OS X at the moment, but it should be able to work on any platform that supports wxWidgets (Linux, Windows, Mac, etc). There are a few things I want to clean up in the application before I release a 0.1 version on the Internet:

• Dialogs like the commit and add ones need their layout made nicer
• At the moment, only Apple's FileMerge is supported as an external merge tool. I plan on getting SourceGear's DiffMerge working as well.
• I need to add diffing and history support
• I need to change the way it walks the directory tree, as it's slow with large projects