Hey again,

It is looking like my problem is more involved than just a simple corruption of preferences or anything software wise.

I first posted my problem on the MacRumors site, and somebody posted a link to this:

http://reviews.cnet.com/8301-13727_7-10332007-263.html

I haven't opened it up yet to look inside, but I have made some reliable observations:

After a cold start, or having had the Airport off overnight, I can get 30 minutes of use first time out, before it drops a connection.

Then, after it drops a connection, if I turn it off for at least 10 minutes, I can then turn it back on and get 5-10 minutes of connectivity before it drops again.

So, it looks like a mechanical fault caused by heating/cooling. Interestingly, according to the article, this was only reported in the 2005 iBooks, the 1.42GHz model (the last, and "top-of-the-line") so others may be unaffected. I am supposed to get another family members 1.33GHz 2004 model, so when I receive it, I'll be able to make some comparisons.

So, right now, I'm doing fine with a USB wireless modem...better than nothing, I suppose. Ugly as sin, though!