I just came across pyrtflib - there's not much (any) documentation on it, it's kinda a case of installing it and then using the inbuilt help() function to find out what's available and what everything does.
Having said that in my little trial run of its rtf.Rtf2Html.getHtml() function it went well enough. I haven't tried the Rtf2Txt function but given the simpler nature of converting rtf to plaintext it should do fine I'd expect.
