Is it that third party authentication in general and OpenID in particular can't be used to login to websites, if I'm on mobile phone?
The reason I ask this is because buxfer doesn't seem to allow this:
You will not be able to login to the mobile/iPhone site, Facebook application or Firebux because your password is not stored by Buxfer. To explicitly set a password for your account, login and click on "Settings » Password"
Is it a limitation of the website, or OpenID?