I am pleased to announce the release of vacuum, a library for extracting graph representations of values from the GHC heap, which may then be further processed and/or translated to Graphviz dot format to be visualized. The package website is at http://moonpatio.com/vacuum/ , which contains a gallery section (which i hope to add to over time). The most recent version is 0.0.6, which is available on Hackage: http://hackage.haskell.org/cgi-bin/hackage-scripts/package/vacuum/ . Feedback, comments, and gallery submissions will be gratefully received via this email address (contrary to the email address currently on the vacuum Hackage page (i fail at setting up email :)). Matt