Using git repos at drupal.org as my vendors branches an adventure as it happens

For the longest time I have been using my own private SVN repository to do drupal development. I used the method docuented here http://www.davidgrant.ca/maintaining_vendor_sources_with_subversion. to maintaine a private core repo.

Every time I would would start a New Drupal web site development project I would checkout a new working version based on the repo, and then I would create a seperate git repo inside the of the /sites/defualt directory to keep indvidule web site customations.

Times they have been changing.

That old meod worked well for me but with drupal.org's recent move to using git to maintain the drupal core and modules there is no longer a need for a private repo. I can use their git repos as a remote "vendors" branchs and maintain drupal modules as git 'sub modules'

Well thats my therory anyways I will be docmenting live the progres and  chalenges that I face implemnting the above simple souding plan.