In case anyone is interested here is the latest version of rsync (3.1.0) compiled for Fremantle.
I ./configure'd with "--disable-largefile --disable-ipv6 --disable-locale". Should be OK for everyone.
Just unpack the gz and put it anywhere on your $PATH (/usr/local/bin does the job quite well). I've tested it against 3.1.0 (Debian testing, protocol version 31) as well as 3.0.9 (Ubuntu 12.04, protocol version 30).