Just picked up a Pre-Paid Optus MyTab for $137 at Harvey Norman Moss Vale, down from the already reduced price of $149.
No sure if it's just Harvey Norman Moss Vale, but the sales guy also offered to sell me the Telstra T-Touch for the same price.
I know there's been a few deals on these floating around on Ozbargain, but this is by far the cheapest I've seen.
Also, if you're interested, the Optus MyTab now runs Android 2.2 ( See http://www.optus.com.au/mytabupgrade). For $137 it's a pretty cool piece of kit.
Doesnt this one have a resistive screen? That alone is a deal breaker