I would gladly pay to have Cut The Rope on my Trophy, I got it for my ipod touch, got it for my Android phone and would gladly pay for it again on WP7.
Perhaps MS should look at the top 25 apps or top 50 developers and offer them an enticing proposition to develop for WM7. I know apple has the market-share and the sheep will always follow, but I had the ip4 for six months and will not buy one again. I just moved all of my games to my ipod touch I had lying around but really want to carry one device.
Its a chicken and egg situation, the more apps available the more users will find a reason to buy, but until more users buy a WP7 device developers will always use market-share as an excuse as to why they are not porting.