There are occasions where you’d not able to aceesss GMail. If there’s a gmail outage (then you’d see 502 Server Error) or there might be scenario where you want to see your gmail on the fly or you don’t have gmail access in your office/work. In these situations you can access gmail using iGoogle (Google personal homepage app).
Google’s Gmail suffered outage leaving many users with no access to their email, online calendar or contact information.
NewYork Times reported that Google’s Gmail service froze Tuesday at 9:30 a.m. London time, leaving millions of users in Europe without access to e-mail for four prime working hours.