I modified Burles's ACS image processing script into a set of procedures (prefixed "hogg_acs" in astrometry/pro/hogg) that perform x,y to RA,Dec (and back) transformations for ACS "FLT" (ie, not distortion-corrected) images. This will plug into image combination code downstream, and might be a prototype implementation for future astrometry.net output.
Morad improved his K+A nearby neighbor figures. Oh wait, that only counts for Morad's research blog, not mine. D'oh! We did discuss the problem of making easy-to-read figures.