I came into this late but 3 days after ffr2822's post.
For me, the Date & Time hang turned out to be a network
issue. In a restart, tv failed to go to the correct one and
after a long search the unit presented a screen indicating
an incorrect choice - which let me proceed to find it and
enter my password. I hasten to add that my firmware is
5 point 3 not 5.01 or, 2. Either the last update was huge
or the early posters who suspected firmware issues need
glasses adjusted. Good luck with this one. Hang is bum.
So I had this problem for months!! I reset it via my mac, and wifi... it would always connect to the internet, but never go past time and date... once even got it to "language" and got stuck there. BUT it did work when I went to the apple store, and when I went to another house with wifi.
SOOOO it was definitely a firewall problem. I reset my router, and reset the security settings to "low security". Done. Works just fine. I actually set it back to "medium security" and it's still fine. Good luck all!