So, it turns out that Amazon’s got a great deal on VMWare Fusion… $35 after rebate:
Also, two different readers (I have 2 readers?) pointed out a better RDP client, Chord. It’s still a Terminal Services/Remote Desktop client, but with such obvious features as multiple and saved sessions, and the ability to change the screen resolution by just resizing the window. I think this is going to replace Microsoft’s client for me.