Update
Drove out to Watsonville and found a Starbucks with wireless Internet access. The process of finding the place was a collaboration between Google and Yahoo—I used Google Maps to search for [wi-fi near 95076], then I went to Yahoo to get directions because they have a "mail directions to your cell phone" option. Only it turns out they really just mail a URL to your cell phone, and you follow that URL in your phone's browser, but at least the end result is a plain-text version of the driving directions displayed on my Treo's screen.
(Yahoo's "find Wi-Fi hotspots near this location" option gave a bunch more nearby search results than Google's, but none of them were quite as close to the workshop's location as this Starbucks, which didn't appear in Yahoo's results. I think that's just a matter of the two services having different business directories.)
Anyway, so I finally got email access. A big relief. Unfortunately, also managed to work myself into a really bad mood; not sure why or how. Just grumpy and tense about a bunch of stuff. Though dealing with Sprint Customer Service's Rebate phone line definitely contributed quite a bit. The usual sorts of problems: customer service says I need to talk to the Rebate people; the Rebate number is a phone tree that, after navigating down four levels to get to a live human, rang 15 times and then hung up; on the next try, I got a live human who couldn't hear me and so just kept repeating her opening request for my phone number. But I did eventually reach someone who could hear and could help me, so I think that's straightened out.
Anyway, I won't subject y'all to further grumpiness. Time to head back to workshop and try to focus on reading, writing, and critiquing.
I'm guessing I won't get another chance to see email 'til Wednesday or so, so if you need to reach me about anything important, call my cell phone.