Molecular Dynamics for CPU and AMD GPUs (Windows): yes
Does this tell me that WUs are available for Win7 AMD Radeon HD 7700 GPUs?
I ask because none are downloading. Is there a special option I need to activate?

Thanks

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Molecular Dynamics for CPU and AMD GPUs (Windows): yes
Does this tell me that WUs are available for Win7 AMD Radeon HD 7700 GPUs?

No, it's just a selective setting in your profile.
Workunits for AMD Radeons are very sparse here.

I ask because none are downloading.

There are no such tasks queued. See the server status page for details. (there's a link to this page on the top right)

Is there a special option I need to activate?

No, there isn't.

Thanks

You're welcome.

PS: the production line of this project is based on CUDA, and it won't change in the foreseeable future, so one should have NVidia GPU to achieve considerable contribution.