I'm going to reiterate the sentiment that the Mac mini is small enough and only needs to be more powerful. [...]
Blu-ray
256MB GeForce 8600M
10-in-1 multicard reader,
HDMI/VGA out (DVI with adapter)
+Multimedia Keyboard and Mouse
The Mac mini is targeted at switchers. It's an entry-level desktop computer. It doesn't need HDMI. It's pointless to include a keyboard and a mouse. It will not have Blu-ray before the Mac Pro, MacBook Pro and iMac, probably not before the MacBook either.
A 10-in-1 multicard reader requires too many slots for Apple to be able to integrate it into their nice designs. Besides, you can connect your camera directly into a USB port, the camera serves as your card reader.
As for the GeForce 8600M/256MB, I wish.
Because most people use them as media centers.
I wish people would stop saying that as if they had any statistics about it. The Mac mini is a desktop computer, not a media center box. There is even dedicated websites for Mac mini users, such as 123Macmini.com.
Saying that most people use the Mac mini as media centers is as annoying as Windows users who say that most people use Macs for design and art stuff.