Doesnt say anything about the Tuners, other than that they are 'Digital', so my guess is they will just be SD tuners, not HD tuners.
If you want to get the shiznit in HD PVR's, then look no further than the Beyonwiz DP-P2. Twin HD Tuners and 320gb HDD, as well as this, it is the first HD PVR to feature AV inputs, to be able to record to its HDD, from external sources such as Austar/Foxtel and/or VCRs or whatever.
http://www.beyonwiz.com.au/Retail is $999, but people from DTVForum have reported getting them for around the ~$800 mark. They were only released ~2 weeks ago IIRC, and now replace the DP-P1, which is identical, except only has a 200gb HDD, and no AV input. Read up over there, or on the Beyonwiz forum, for more info.
Good luck.