I'm back in the UK and have updated my page about using Cosmote My View’n'Web here:
Greek Internet Weather Yacht Vigdis
All comments and corrections welcome. Use the 'contact' email address on the blog or PM me here (or on YBW - same username).
I think that some people will be put off using this service because I do not describe how to use it under Windows, or with an HSPA modem - a 'dongle'. If anyone who has done so feels like writing and maintaining a page on how to tether and configure it with Windows (XP, Vista, 7) I'd be happy to refer to or include it - though personally I would hesitate to connect Windows to the internet on such a limited-data-volume service: it's hard to prevent programs updating over the internet.