I received a mailer yesterday saying this year's Navi update DVD is on sale for 20% off. $149 is still a lot of money for an update, though. It's just not worth it to me.
http://www.hondanavi.com/
Other updates I need aren't that expensive. My Mio update is only $15. My Garmin update is only $69.
And speaking of Garmins. I bought two extra Garmin c530s that I don't need. $250 shipped.