Update...
I took my van in for the wind noise issue (on passenger side - very loud almost like the window is slightly open) as well as the XM radio "Check Tuner" error message. They decided to replace the seals on the passenger door - on order. The XM radio has had the Check Tuner error msg at least 15 times in one month. No pattern at all. Will come on when switching from another source (say USB or FM) and radio will not work - even if you turn off car and start again. Park the van at night with error, wake up next morning and working fine. Drive for a few days and will randomly appear. First visit to dealer (week ago) they did the "RESET" which wipes away EVERYTHING!!! Very annoying - all settings/preferences GONE! Phone. Navigation. Favorites in Navi. ALL SETTINGS GONE! You would think Honda would develop a way to DOWNLOAD all those preferences to a USB drive or something, reset the system and THEN restore the settings. But no, 4 hours of settings GONE.
So, I didn't redo my settings yet because as I have read online, this "RESET" will NOT fix the problem - be warned - but they will want to do this as a "first" measure to solving the problem. They claim no guidance from Honda on the issue, but from reading on the forums, I think Honda corporate HAS to know by now. I gave it a month of annoyance (and time for them to figure out a solution), but this is where they are - so be warned. Took it back in Saturday and they wanted to do the same thing. I said NO. It is clear you have an issue and need to look at ALL the wire connections - not just a "reset" and send me on my way. They kept the van for 8 hours! And it was still not ready. They plan to "replace the XM tuner module from another Odyssey" - not sure if it is coming out of one on the lot or being shipped into the dealer.
They did warn me that "Honda Tech" (whoever that is) has "full discretion" on how this gets fixed. I got the impression they handle all the software/media interface "gremlins" and don't want to start pulling units and replacing them just yet. I'm sure that would get expensive real fast. My guess is this is happening to more people and they know it, but people are just not bringing it to the dealer (yet) just like I waited for 4 weeks before it just got annoying AND we have a 10 hour trip coming up in 2 weeks.
I will update as I get more info, but wanted to help out anyone suffering from this problem too.