The Xbox support team is currently working on resolving the "Signing in to Xbox LIVE" issues, you can check the status on the following link:
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Incorrect use of WTF there but - They are working to resolve the current Xbox LIVE issues. Check in here:
http://xbx.lv/r0tXNK for updates!
Stanno lavorando per risolvere i problemi attuali di Xbox LIVE. Arrivo qui:
http://xbx.lv/r0tXNK per gli aggiornamenti!
Que vergüenza estamos pagando un servicio que no se nos esta dando, se nos recompensara de alguna manera espero, que esto suceda un sabado tiene tela..........