i am having the same problem with sled10 sp1 x64 on leopard with fusion 1.1RC1, using my prod key. it failed at the very last h/w configuration with black blank screen, no cursor blinking.
when i restart the VM it prompts me that the installation failed and asked me to continue intall or not. to continue only observe the same result; not to continue actually brings the VM to work correctly except my sound card sin't configured - i am ok with that. after this the VM appears to be working fine and i can congigure my display in sled.
in all i was told that the installation failed but i am ok to use it for most part.