first off i drive a 15 year old B4 IZ Passat in the UK, its a 1.9 common rail design and I love it being a diesel, it designed for German roads so does 80mph in 4th and bimbles along in 5th. But it does have smoke and particulate issues and thus is banned from many central area of German cities which will rapidly roll-out across Europe in the next few years.
You may already do this BUT
I thought I should point out an issue with your particle trap - RTFM - you must run it at high revs with a cleaning agent every so often to burn off the particles in your particle trap. If you fail to do so it WILL become blocked and it's an expensive and obviously unnecessary garage bill.
BTW the reason Diesel is expensive is because everybody uses it, gas/petrol is a side product from production. Although VW don't like people doing it, its perfectly possible to run your car on vegetable either fresh or recycled but you must remember to change the fuel filter after a while as the veg oil tends to dissolve the gunk in your fuel system and leading to it ending up in your fuel filter
the one thing i hope is that European and far east manufactures will start selling you in the states the sizes of engine we get over here. The latest 1.6litre blu-motion (urea additive) passat's have a higher list KW than my 1.9 passat and I have no problem doing 110Mph on German unrestricted autobahnen and that was with 4 people on board and a load of luggage in my station wagon.
Btw i get about 10 miles per litre on average in my 1.9 passat station wagon that based on mostly urban sometimes highway driving. So that's a bit less than 40 mpg (US) - not bad for a 15 year old car that has driven to the moon (~240,000 miles)
Apparently VW has worked out that hybrid diesel makes sense as diesel typically need bigger batteries anyway, so apparently hybrids will increasingly be seen as will the regenerative braking ideas derived from formula 1.