[TripWire]

VNV,
Also have the factory nav with XM. Never figured out the XM Info button either. I assumed it was like when your on the FM's...some FM stations broadcast data (ie. Station name, DJ, etc) that after a minute, it will not be greyed out and you can press the Info button and see that data.
I can tell you what the XM Category Seek/Scan (with the little padlock thing) does. When enabled, say you arrow over to Talk&Ent and hit select. Then the hard Seek button (not on-screen, the vertical one above tuning knob) will seek/scan thru only the Talk&Ent channels. When that option isdisabled, the Seek button just changes channels normally (like the tuning knob). If there is an actuall timeout on the XM Info, not sure what it is...I sat there just now for like 5 minutes and nothing happened. Will try to remember to check again when driving home from work.
HTH