W0ot! Thanks for the excellent diagram WavingSparks.
It's very helpful to have such a nice graphic explaining the data flows. As you discovered, Sunlight is very interested in financially supporting and being part of making transparency information available.
In interest of transparency, Sunlight is also supporting Taxpayers for Common Sense to update their website and offer smaller transparency grants, too (http://sunlightfoundation.com/grants). GovTrack is a pretty efficient and essential website and is nobody's weak link! For more related websites check out:
(Link: http://waving.deadsquid.com/?p=29)