The valve adjustment on Hondas is a critical element of a good maintenance program. Honda builds a generally reliable car. But it is not necessairily a low maintenance car. Honda does NOT recommend ATF changes at 30,000 miles. They do NOT recommend oil filter changes for 10,000 - 20,000 intervals using FRAM oil filters. They do NOT recommend any type of synthetic fluid (for that matter, the only fluid they do recommend is the stuff with Hondas name on it). And they do NOT recommend valve adjustments for 100,000+ miles.
On the other hand, they do NOT offer a 10 year, 100,000 mile warranty.
My point is, if you chose to follow Hondas recommendations, they are only liable for any damage these recommendations cause for the first 3 years, 36,000 miles (5 year, 60,000 on 2006 models). Each owner must decide for him or herself what type of maintenance schedule makes sense to them. Personally, I think 30,000 mile valve adjustments is "cheap" insurance to promote a long-lasting vehicle.