I submitted mine on January 18 and it went through fine. I also received a confirmation email from them.
Hard to say, most probably since they are filling bankruptcy, but it sounds like that money might not be from them so it is possible they still pass it on. I don't know what legal standing there is for rebates.
I finished submission and got check in 3 weeks. This is the easiest compared to CA rebate process. What are you stuck on? You need to submit an account number and upload a bill, registration from DMV(not temporary one) on the proof page after application.
The money is not out of PG&E's pocket, so I don't think it will be affected by their chapter 11 filing.
Is this a one-time deal? Farther south, in S.D., the gougers are at least coming up with a yearly rebate (last year's was $500/vehicle, and the year before that it was $250 or so - apparently the amount each year is dependent on demand). Cap and Trade money being used to fund this, supposedly. But if PG&E is a just one time payout, that's too bad.
PG&E emailed me today; my application was approved and the $800 check was mailed out. I submitted my application on January 18th, so the process took about 3 weeks.