We are mostly a Windows shop but more and more Macs are being used.
Is there any software that would run on Windows Server 2008 R2 that could be used to image Apple computers?
I looked into this a while ago. It appears that a process very similar to Linux pxeboot is possible.
Basically extract the kernel and drivers - much like vmlinuz and init.rd on Linux - and boot an os from an nfs or http location.
See http://hints.macworld.com/article.php?story=20090317042911165 for details.
On a related note the pxe and http servers can both be windows or Linux. I have tried both at one point or another.