I did. (I am neither a grad student nor poor any more). It wasn't very convenient carrying large milk and juice containers and large serial boxes back on the bike and Atlanta is not a very bike friendly city.
Riding a bike instead of your car has advantages even if you're not poor: it's good for your health & good for the environment. But if it's dangerous because of the city I can see why you don't use a bike...
Thank you for that link. I have been living life with a rather short sighted perspective of late due to dayjob+startup leaving me no time to breathe. I plan to change that in the near future and a bike is part of that plan :) These bags should be helpful!