I have some generic feedback:
- "sign in with other OpenID" page could do with something saying "loading", preferrably in the ActionBar. Also the login buttons should be listed vertically instead of horizontal.
- Notifications should work like another sliding drawer. Google said to basically copy the Google donation app for this
- Can you replace Pull to Refresh with https://github.com/chrisbanes/ActionBar-PullToRefresh
- I would reconmend changing some of the app branding based on the site, for example the ActionBar colour
- I don't know if it's implemented, but GCM push for notifications would be nice (along with expanded notifications for these)
Overall, it feels fairly nice