Hi Art. This is Amy MacDonald, we met at the Moodle Moot a few weeks back at GDA. I recently posted my concerns about lack of computer access and someone sent me this thread that you started.
One way I try to bridge the gap among the kids who do not have computer access at home is to expand on my due dates/deadlines for various things. I might give an extra few days for a homework assignment, allowing kids to get to our Moodle site at the library during lunch, breaks etc.