It's a perl script. It doesn't need porting, it works fine!

It has a number of prereqs:
libwww-perl (which in turn depends on liburi-perl, libhtml-parser-perl, libhtml-tree-perl and libhtml-tagset-perl) all of which can be got from:
http://harmattan-dev.nokia.com/pool/harmattan/free/

and rtmpdump (which can be obtained from):
https://build.pub.meego.com/package/...attan_standard

After that, just download the latest release from:
ftp://ftp.infradead.org/pub/get_iplayer/
unpack it and it works fine.

woot!

Update: I should have mentioned that I used --raw to get the files without transcoding them and they work in the normal "Vodeos" app fine.