Japan: My two sources are Stuart's Puroresu Fan (which has recently transistioned into a NJPW/Osaka primary site) and Zach Arnold's Puroresu Power, which is the one that appears on A1. Dealings with Mr. Arnold have taught me that Zach is a little bit insane at times, but better him having to translate than you.
Most everything: You want to find KrisZ's posts - he does a translated newsbits/show results/show lineup thing on a few different boards, including DVDVR's and PuroresuFan's
Mexico: HAVE YOU SEEN THE LINK DOWN THERE IN THE SIG. Because mostly all it is translated stuff and repeats from KrisZ. LuchaWorld can drop a newsbit or two, but it's really more a very quiet message board.
MMA: Scott was just telling me that there's no place for good MMA discussion the other day, but I wasn't paying attention because I don't care about MMA BUT the website I hear get thrown around the most is MMAWeekly
Indy: I've completely fallen out of the loop here. I remember waaaay back in the day that Jess McGrath used do some good stuff on 1wrestling, but I haven't checked it out in forever.
Joey Maggs was amongst the many enhancement talent wrestlers that are never really given enough credit. In countless matches on WCW Worldwide, Saturday Night, or The Main Event, Maggs did his job-- making the stars look like stars-- with excellence.