Well, I just figured out to do it half-way. I can access my home network using Astro. Go to the Network tab, make a new connection, choose SMB, download the Astro SMB module and then enter the computer names under Server. And now I can access both my Win7 and WinXP machines. I can see all the shared files on those two computers.
I haven't figured out how to see the EVO with the Windows computers. Any ideas?