One of the great things about Windows Home Server is it can act as a "proxy server", giving you access to any Remote Desktop capable machine on your LAN.
One of the pain in the butt things about it is, if you set your PC's to go to Standby, they're inaccessible.
How to overcome this limitation? A fellow Microsoft MVP, Evangelos Hadjichristodoulou, has written an Add-in for Windows Home Server that will send the "magic packet" to wake up a sleeping machine. Of course, the PC must support Wake-on-LAN and this feature must be enabled in the BIOS of the PC, as well.
A reboot of the Windows Home Server machine may be required after you copy the files to C:\Program Files\Windows Home Server on the Windows Home Server PC.