Erlang/OTP R13B02 has been released on Sept 22. Please be sure to use otp_src_R13B02-1.tar.gz as the source tarball, because there was a serious bug in R13B02 (see http://www.erlang.org/download.html)
Quick observations - 1) the !"§$ version scheme needs *yet another* fix to accommodate the -1 patch release. I could get it to download the right version by appending -${ERL_VER[3] to MY_PV, this should probably be added conditionally whenever [3] is not empty. Maybe we should just hardcode the friggin' string into each ebuild.. :/ 2) the LDFLAGS patch (bug#263129) does not apply any more. Not sure if it has been added upstream or what.
Thanks for your intial work and the notification. I did only manipulate MY_PV, but not the version string of the ebuild...it is still R13B2 and not R13B2-1.