Try these numbers.
They dial into uu.net. Another option is to use your isp's information. Enter your isp's phone number, your username and password for your isp's validation, and then remember to take off the 's' from 'https://....' and it will download the latest image.
You will still need an MSN account to use an MSN Companion 'as is'. I don't think anyone has found a way around that *yet*.
I took my stock IA-1, turned it on, did a Ctrl-U three times to get to the dialing screen. Entered the first 888 phone number and within a hour it had upgraded the 1.0 software to the 2.0 software. I have not signed up for an MSN account yet. I have some things I want to try with the unit, but it was nice to verify that if I do *royally* screw things up, I can recover. Of cource, only if this dialing screen is preserved!