I have a bootcamp partion on my iMac and a Fusion VM--
If this Virtual Machine a normal file based Virtual Machine or is it a Boot Camp partition Virtual Machine?
I set up the bootcamp partion first. I'd like to get rid of the bootcamp partion and just use the VM. Is there a way to do this?
As far as getting rid of the Boot Camp partition this really has nothing to do with Fusion unless you're running the Boot Camp partition as a Virtual Machine. If the Boot Camp partition is not being use as a Virtual Machine the you can remove the Boot Camp partition using Boot Camp Assistant with is a part of OS X not Fusion.
If the Virtual Machine is the Boot Camp partition Virtual Machine then you can convert/import depending on the version of Fusion you're using. 2.x has a built-in importer and 1.x would require you using VMware Converter.
another possibility: On my MacBook Air, I have just the VM set up. Is there a way and would it be easier to transfer this over to my iMac (or would the different hardware settings create too many problems)?
In general normal file based Virtual Machines are highly portable and can be use on different physical system regardless of what physical system they were created on however are some constraints although in your case use scenario as long as the virtual hardware versions are compatible with the version of fusion you have installed there shouldn't be any real issues.
FWIW It is very important that you be very explicit and specific when asking questions and as you can see there is some ambiguity here because you were not specify about what type of Virtual Machine you have or what version of Fusion you're using so have a look at as a guideline as to the type of information to include when asking questions.
