Starting to get worried and frustrated.

I sent my application to the Phoenix Lock Box
via certefie mail (US Postal Service) on Monday August 20.
I live in Southern Cal., so it was not much of trip. The guy at
the counter said that it should arrive on Wednesday of that
same week. I have not received any electronic notification
what-so-ever.

I made sure to put G-1145 electronic notification as the first
form in my package.

Should I be worried? Ay-yayah.

i am in the same position . may be we made a mistake and we will soon get it back and resubmit

Don't worry. I sent mine (from S Cali) on the 15th, and received I797c letters on 8-23-12 but my case still cannot be found on uscis.gov
I've seen people's biometrics scheduled so I called uscis since monday everyday.
Their answer is
"it takes time to process"
I think they even cannot find my case on their system.
Sounds pretty sad..
anyway, anyone from So Cal received a biometrics schedule letter?

I'm in the same boat. Except I sent mine to Chicago using USPS priority mail on Saturday and still nothing. I called USPS and all they could tell me is that it's still not delivered.

The messed up thing is that I only live AN HOUR AWAY from the Chicago address. I was told to call again tomorrow -__-

I sent mine to them august 16th, to the chicago lockbox.. they received it august 17th, I received my g1145 notification august 24th, the I 797c notification came on monday, august 27 and when I go to uscis.gov my case shows up there, it's in initial review now.

Twins! Well, almost...

I'll be glad when I know my app is in USCIS hands :-/

Cali here too and no biometrics appt. as of yet although i did sent my the 17th, got there the 20th, but wasn't received until the 21. I just my I-797 letter on monday so, hopefully by end of week i'll get my appt. letter (hopes)

me, too.
hope I get mine by the end of this week.
I will call uscis until I receive my biometrics appointment letter or till I can check my case status.

Don't worry, mine got there on the 17th and I never got a email or text from them. I received my I797C on august 27. The G-1145 don't always work for some reason.