What can I invest in for my RRSP now that I am non-resident?

I am forced to pay back my LLP and HBP when I became a non-resident of Canada so I plan to make a big RRSP contribution this year. However, once it's in a registered account, it seems like I don't have any investment options since now I am a non-resident and I cannot buy any stocks, mutual funds, gic, etc. Am I supposed to just leave the money there sitting there as cash in a registered account?? Any advice on what I can invest the money in??

You need to move your RRSP to a broker that dela with you while in US.
Then most options you had before will be available.

And the pay back to RRSP when you move must be done in the first 60 days after departure, not simply by the regular RRSP contribution deadline.

Do you know of any RSP brokers that deal with someone like me, a Canadian who is now living in the US?

TD Waterhouse is the only discounter that deals with US residents. there are several private firms that do.

I am a Canadian living in California for the past year or so. I am wondering how I should report my RRSP and what exactly could I get taxed on?

I basically have a self directed RRSP account on CIBC and I haven't made any transactions to it since I moved (i.e., no buying or selling of stocks) so I have no capital gain, but may have some dividend payments to report. I have not made any withdrawals from my registered account so any dividends paid would still be sitting in there.

I also made one lump sum RRSP contribution to offset my LLP repayment last year but it's sitting as cash right now.

Can you advise on how I should complete my form 8891 and what my tax implications are, since I live in California?

For california, you are liable on all income your RRSP generates internally (ie treat just like an ordinary non-sheltered investemnt account).

For 8891 questions see me at forums.serbinki.com