Centre Com have the Microsoft Natural Ergonomic Desktop 7000 for $94, which becomes $34 after the $60 cashback.
Currently they have stock at Sunshine & Clayton, but may have stock in other stores.
I bought this yesterday, but since Officeworks is closer, I got them to pricematch, so payed $89.30 ($29.31 after cashback). Not bad for a $200rrp keyboard & mouse.
Even with shipping, it still beats Officeworks at $119, so might be good for pricematching elsewhere. Shipping is $20 to Sydney, $15.4 to Regional VIC & $8.25 to Melbourne metro & Geelong. Though apparently $50 to Perth, crazy :(
Update: Scan of receipt uploaded (blanked personal stuff out).
Also, the checkout woman mentioned that it was $34 (due to Centre Com's misleading advertising of post cashback price). I had to correct her to the $94, might loose some OzBargain cred though.
Thanks, I might get one today. Could you possibly post up the Officeworks receipt?