Its strange but isnt it up to you? Whose going to do them otherwise? Brett?
No one would do them, but the pre-order chart has to be published before I can do the main US chart, so I'd need to get Talon to cut the pre-order stuff out of the publishing process.
I proposed ditching the pre-order chart probably a year ago to Brett (mostly because I really wasn't happy with the accuracy), but Brett didn't like the idea.