My view of the conversation so far: 1) Aeson option 3 or 4 is desirable - we all want aeson, we don't want blaze-builder 2) dlist has generated a fair bit of discussion, but no clear agreement. 3) no one has weighed in on scientific We need to come to rough consensus on these issues soon if we are to get to aeson in this round. My opinion, with my "HP Release Manager" hat on: I'd like to see a version of aeson-0.7 that didn't use dlist (just, ick, duplicated what it used in it's innards), and either had the Scientific removed, or as part of aeson itself (rather than as a separate package). I recognize the sub-standardness of this solution, though it is forward compatible with future evolutions (such as exposing dlist, and/or scientific). - Mark