Technically? Yes, I think so. The WinRT version of the surface uses Tegra 3, so it'd be like doing an Android SDK port.
Legally? Absolutely not. Asus didnt pay for the Infinity to be licensed for winRT. If it does get done, you certainly wont be hearing about it here.
Then again, that hasnt stopped the HD2 people from freely discussing and using WP7 here, so maybe I"m missing something.
Current phone - Nexus 4 16GB (CM10.1 RC2)
Current Tablet - Nexus 10 32GB (CM10.1 Nightly)
Previous devices - Motofail Backflip (CM7.2 Stable), Motofail Atrix 4G (CM10), HP Touchpad (CM9), Asus Transformer TF700 + dock (rooted stock ICS), Nook Color (CM7.1), Samsung Blackjack II (WinMo 6.1)