We are using Revit 6.0 and the newly issued DWF printer. The DWF publishing system will surely be great, but is there still something wrong with printing DWF from Revit? The larger plans will always come out as raster images whether you check "vector processing" or not. The smaller drawings will come out fine as vectors.
If you try to get sufficient quality, the raster images are very large and incredibly slow. Setting raster quality to "low" produces an unusable file, but the file size is still quite big compared to dwf printed out of AutoCAD with the old DWF plotters.