Here's a few guys here in Sweden who modified an old Volvo to wood gasification, and took a tour around all of Sweden this ummer. 5400 kilometers or something.

Around Sweden with Wood in the Tank

http://www.vedbil.se/indexe.shtml

And here's the photo page, including pictures of blonde female groupies. Apparantely wood gasification is hot with the chicks over here... (OK, only one picture, but I bet that got your attention)

http://www.vedbil.se/fotoalbume.shtml

Some facts about the car:

acts:

Top speed: 90km/h (105 km/h with dry birch wood)

Acceleration 0-100: Some times :)

Wood consumption: 1 cu m / 1000 km

Cruising range on one load: 70 km

Start-up time: 2-10 minutes

Kerb weight: 1460 kg

The producer-gas systems weight: 260 kg

On route, they visited and kicked life in an old tractor, to run on wood gasification/producer air. Blog entry, text in swedish, but there is a video of the engine once they got it going:

http://www.vedbil.se/dagbok/resa/20.shtml

And the wood gasification enthusiasts in Sweden have another website at http://www.gengas.nu/ but swedish language only. Sweden more or less survived on wood gasification during the entire WW2 (and that included agriculture), although car use naturally was much, much less than today.