PSAboot is an R package to assist with bootstrapping propensity score methods. I gave a talk today at the useR! 2014 Conference. The slides can be downloaded from the PSAboot Github page or directly here. The package is described at jason.bryer.org/PSAboot and maintained on Github at github.com/jbryer/PSAboot/.
Also, version 1.1 of the package was just released to CRAN.
I have started an R Users Group for the Albany, NY area. Hopefully we get enough interest that we can host a meeting in the next couple of months. Please feel free to share with your colleagues and friends.
Feel free to email me or leave comment on this page or on the Meetup page if you are interested in giving a talk or hosting some future meeting.