MikeLex

Yes, it is the one near the firewall.
It is expected that a 10+ years engine have some leaks coming from a defective gasket and/or sealant. Defective valve cover gaskets are good candidates for leaks especially on 1MZ-FE engines. So, before anything else clean it all up to help you pinpoint the leak source. If it is coming from the front valve cover, it's an easy diy. If it the rear then it gets a little more complicated (and expensive if you're not good with wrenches). There are other possibilities: cam seals, rear seal, and of course the oil pan sealant.

nicks88

AndyG- I just did my oil pan yesterday. You can get the FIPG sealant at the dealer, or I used this stuff called "The Right Stuff" gasket maker (got it at the local auto parts store). Works amazing. Used it on several cars of mine. The oil pan is so easy to fix. Just make sure you clean it and get all the old sealant off!! There are 10 bolts, and 2 nuts to undo, and then get a putty knife, that you would use to fix holes in your drywall, and carefully use that to seperate the pan from the motor. Mine was stuck pretty good but the putty knife worked amazing (got that idea from another forum member). Then use brake cleaner or something similar, and I used a gasket scraper and a metal dish scrubber to get the old crap off. You will see that it is SOO EASY... one of the easiest fixes I have done.

AndyG

Kickass thanks mike and nick and everyone else for the suggestions!