Export your Google Code project to XML.
git clone git://github.com/mconf/google-code-export.git
easy_install BeautifulSoup
cd google-code-export/src
Standard parsing:
python main.py -p myproject -s 1 -c 100
Filtering by label (only saves issues with this label):
python main.py -p myproject -s 1 -c 100 -l "Component-MyComponentName"
Also look at src/users.dat and src/status.dat for users and statuses
mappings.