Your an avid readers since 2004 with Zero posts?
No, i have never done the swap so I'll offer some thoughts only. In short if you strip it down to the bare block with heads I'd bet you can simply transfer everything over. That is assuming you can keep both engines out and have access to both at the same time!
At a minimum the engine harness must be moved, as your new engine has less coils. The rear bank of your old engine likley had 6 coils. Meaning: If the rear bank of the NEW engine isn't drilled and tapped to hold those coils you need the valve cover off the old one and new gaskets ect.
Must swap;
Wiring harness.
Coils.
Sensors, MAP.
Exhaust manifolds and EGR assembly.
Likely the intake plenum and intake manifold with old fuel injectors (because of difference in IAC?).
What I don't know about are the majors:
Is the secondary oil pan the same to fit as yours? Are the crank pullies the same diamter for the accessories? Are all of the engines mounts to the block drilled and tapped for your application?
Wrecking yards have an index called the Hollander Exchange. It lists parts that directly exchange with each other. You need to know if the CORE BLOCK assembly is a repalcement! Yes, we all think it is but it may not be easy.
I'd expect you'd be swapping most all of the smaller bolt on stuff. You could compare some stuff by pulling down two web pages side by side like
http://www.toyodiy.com/parts/g_U_199...-AEPNKA_1.html
It'll give you peace of mind before spending the money.
What happened to the old 1MZ?