ALDI is have yet another tech-centric special buy offering this Wednesday, with products including a 46-inch LCD TV for $549 and an iPod-compatible micro-stereo for $119. Those are reasonable deals, but its 2 metre HDMI cable for $6.99 isn't so hard to beat.
Many Australian stores will charge you $30 or more for an HDMI cable and that's a complete rip-off. That said, it isn't too hard to find similar or better prices if you go online.
Kogan will sell you a 3-metre cable for $8, though you'll have to pay postage (unless you wait for a free shipping day). A quick peck through eBay finds plenty of similarly priced deals with free postage. ALDI's price is competitive and could be convenient if you're in there anyway, but if you miss out you can definitely score the same price elsewhere.