There's very lively activity on the Triffids forum on the concerts that were played last week in Sydney with various guest singers. Steve (Weasel) also posted four mp3's of live performances on last Friday. Read about it here : http://thetriffids.com/forum/index.php?topic=1487.225.
For your convenience and with Weasel's approval, I compressed the four mp3's into one file, which you can find here. It's The Triffids with Melanie Oxley (I want to conquer you), with Toby Martin (Personal things), with Mark Snarski (Suntrapper) and with Mick Harvey (The seabirds).