The much anticipated Biztalk 2009 R2 will be released in tandem with the VS2010 launch on April1 '10. Though there is not much of change in the nuts and bolts of the mapping engine, there is a lot of enhancments done with the Visual Representation of the maps. The R&D Team at Microsoft did a good job in helping the visual pain for the mappers. Earlier it was like finding a needle in a haystack with the chained functoids.