Can I pause a Hyper-V guest via the command line?
If so, could I do this over the network from my Win7 box?
Here is a suite of powershell commands to perform actions against Hyper-V (including starting/stopping). They should be usable remotely through PS Remoting as well, but I haven't tested that.
Yes, it is possible - check out the powershell commands.
or
http://www.synergyonline.com/blog/blog-moss/Lists/Posts/Post.aspx?ID=21