I just did a quick look into how much an Intel mini with the specs above would cost approximately:
T2300 (1.66Ghz Core Duo) + Chipset + Pro Wireless (AE) - $306
Radeon X1600 128MB - $99
Slimline Combo Drive - $37
160GB 3.5" HDD - $80
512MB RAM - $77
Apple Remote - $30
Total = $629.
But bear in mind that all of those prices apart from the cost of the T2300, chipset and wireless are all for pre existing stand alone products and are before any bulk discounts are factored in.
I would guesstimate that the Radeon X1600 would cost Apple $40. The Combo Drive would cost Apple $25, the hard drive $60, the ram $60 and the remote $5 (hell they make them and its just a bit of white plastic, a few buttons, a teeny bit of circuitry and a infra-red LED). I also reckon they get a decent discount on the Core Duos.
Using those costs the above specs would cost Apple about $500.
I reckon Apple will do away with the bottom end priced mini and they will start at $599 with Airport Express standard. They *might* go for $549 if airport isn't standard and Apple have some more savings. At $549 you'd also probably be talking core solo.
So $599 for the specs above and $699 for the same + bluetooth and superdrive.
Edit: $499 might be possible with a solo, no wireless and an X1300 64MB. I reckon none of the new minis will have dual link DVI. The iMacs don't so the minis sure aren't going to.