Looks like Optus has joined Virgin Mobile in offering the HTC One S and as a bonus they also have the One V on their website as well. Both phones can be had on the $30 plan however the One S will run you a premium with an $11 per month handset repayment on top or you can go up to the $50 plan with $0 upfront. No mention of Beats headphones with the Optus HTC One S unfortunately so if that is a factor in your purchasing decision then you may need to look at Virgin Mobile.
Specs :

4.3″ Gorilla Glass screen at 540 x 960 3.7″ Screen at 480×800
16GB eMMC (9.9GB free) 4GB eMMC (1.1GB free)
8 MP with LED flash – 1080p HD Video Recording 5 MP with LED flash – 720p HD Video Recording
Battery :380 hrs Standby time – 550min Talk Time Battery :617 hrs Standby time – 500min Talk Time
130.9 x 65 x 7.8 mm – 119.5grams 120.3 x 59.7 x 9.24mm – 115grams

Looks like the issues with the One V have been resolved. If you`re interested in either phone you can check out the One S and the One V on the Optus Website or head in store.