I turned off javascript in my desktop browser and tried to access the login page and it told me javascript is required. But if I open the login page that is loaded into the frame on the left side of the main page into a separate browser window I am able to login and access adwords fine without javascript - besides a few cosmetic differences. Maybe if I use that url on the windows mobile device it will login.
[webmasterworld.com...]
where someone else had the same problem with a blackberry and solved it by opening up the login page into its own browser window. If you or anyone else with a device containing windows mobile 5 wants to try it, the URL is below.
[google.com...]
I am gonna try it next time I visit the store and if it still don't work will try Opera.