jay, thanks for posting your question. I hope I have the same issue some day.. (if gold keeps going up, it might be sooner than later).
You really have a whole different world of problems to deal with.
Over 1mil +, I'd start to worry about:
1. Dollar risk (I'd want to be earning interest in euros or $cdn or chf, with some possible juice on a dollar deval)
2. Institution risk (what if one of my banks fails...)
3. Travel risk (get another citizenship. not too hard or expensive if you're willing ot buy some nice beach property).
FWIW, if it were me I would start trading more on a macro level. I like the mobius-esque idea of cherry-picking investments around the world-- dunnow if that kind of thing appeals to you.
At this very moment, I'd probably be interested in doing private placements into illiquid canadian gold companies (e.g. stock+warrant) cause it's too hard to buy 100k shares of jpn.v on the open market. But I'm a crackpot.
But the very first thing I'd do is go have a sit-down with the private client manager of my banking institution, and ask for help. Even if you don't take their advice, it can't hurt to get perspective from someone used to dealing with people coming into large amounts of money.
Best regards, best of luck, and thanks for your post.
--laz