Subaru has added a touch-screen Nav package as an option on the 2006 Subaru Legacy 2.5 GT Limited. The GPS goodness will set you back an additional $2k, and it only available on automatic transmission models (add $1200), bringing the total price to $32,620.
Seems kinda pricey for a Subaru to me, but Subaru has been steadily increasing the price of their cars (remember when they were $15,000?) for the past 10 years and consumers seem to be willing to pay BMW-like prices for them.