I also had 17000 points with no particular place to go, but Skywards are running a 10% discount promotion on Westfield cards at the moment.
After some juggling with their points plus pay calculator I found that I would have enough for a $50 card (usually 18000 points, but discounted to 16200), but I decided instead to maximise the discount by purchasing a $250 card.
It cost me 16972 points and USD166.50 (the other 28 points did not reduce the cash amount so I decided to keep them). There didn't seem to be a way to pay in AUD so assuming I get screwed over slightly on the exchange rate, I estimate the 17000 points plus the promo will nett me $80 value.
Better than nothing ....