Other Canadian options (all from Horizon BetaPro):
HGD - tracks 2x the inverse of S&P/TSX Global Gold index (gold co. stocks).
HBD - tracks 2x the inverse of COMEX gold price. I tried this one when it was new, but there was little liquidity at the time.
Horizons has a selection of ETF's that track +/- 2x and index or futures market. See their website below.
http://www.hbpetfs.com/