Nice looking app. QUick thoughts so far
* Best not to have predictive text for twitter password entry field (result is also that previously entered passwords in this box are saved - not good)
* Sometimes when cursor is in password fieldm text goes into username field
* During logon, no screen corner allows user to go back to main desktop/task list
* Remember me seems hard to select
* If a password attempt fails, the login username field looses the first character
* sometimes highlit text gets left behind in login name field
* WHen typing password would be great if alpha appeared momentarily before being *'d
* login field defaults to caps for first char -- this isn't usual for username field?
* After one successful login I failed to login again (api limit perhaps)

Will try more later. Hope the above feedback is useful & thanks for creating -- this could be a great twitter app!