Hmmm...well, I don't know exactly to be honest with you.

My boss's TL allows you to 'tell' it what channel you want "XM xxx" will tune in whatever channel you say - so Honda definitely makes such an animal.
Whether it's in the new HCH is something I hope someone here (lucky enough to already have their '06 HCH) will chime in about.

Either way, even if it's just changing presets from the steering wheel- it's going to be much nicer than fiddling with the tiny buttons on the portable Sirius unit that's mounted down in the cup holder in my Insight.
Any controls on the steering wheel are better than what I have now!