How to use... (This would be a good FAQ topic)

It is not entirely obvious how to use this plugin and I don't see any documentation about actual usage. These notes are the result of a significant amount of trial and error.

These instructions are for TortoiseBzr on Windows. If you're using the command line, I trust you can translate these steps to the appropriate command line syntax. If you're on Linux, perhaps RabbitVCS is a good alternative that can handle both bzr and git already (seemed a bit buggy to me).

INSTALLATION ===========================

Install the bzr-git plugin in the Bazaar plugins folder (e.g. C:\Program Files\Bazaar\plugins\git). You must rename this folder to 'git'; if you leave it as 'bzr-git' you will get an error.

Install the Dulwich module into the git folder....
 * http://launchpad.net/dulwich
 * Create a folder named _lib (e.g. C:\Program Files\Bazaar\plugins\git\_lib)
 * Extract the dulwich module into that folder so that setup.py, etcetera end up in the _lib folder itself (.e.g. C:\Program Files\Bazaar\plugins\git\_lib\setup.py). If you leave them in the dulwich-0.7.1 folder, you will get an error.

You don't need any installation of git itself.

USAGE ==================================

Create folder 'myproject' somewhere (we're doing this in Windows Explorer, right?).

Right click, select 'Bazaar Init...'

Right click, select 'Tortoise Bazaar' > 'Run command'

Select the git-import command and enter the URL of git project.
  Note: The URL should be git://, not http://. Do not include anything for a branch.
  Example: If the clone command is
    git clone --branch branchname http://git.mydomain.com/myproject.git
  you should enter
    git://git.mydomain.com/myproject.git

You'll get a message that says, "Use bzr checkout to create a working tree in the newly created branches."
If you explore the folders that were created, you'll see a folder 'myproject/myproject.git', where 'myproject.git' is a bzr repository with various subfolders for the git branches where each branch is also a bzr repository. In other words, none of these will contain any actual files. You'll need to perform a checkout into a separate folder in order to get some files to work with. So...

Back on 'myproject', right click and select 'Bazaar Checkout/Brach'.
For the source, enter 'myproject/myproject.git/branchname'
Change the destination if you want your working folder somewhere other than the automatic one.

That's it!