Hey there Peter
Great to hear! I think you'll like it - it's very logically laid out and works with both their SkyFi and SkyWire controller interfaces. You could buy a SkyFi and control the scope from indoors wirelessly, or the SkyWire for a directly-cabled local connection from your MacBook Pro's USB port to the 507. RS-232 serial cable goes an awfully long way - so either ways will work brilliantly.
Not sure about the KeySpan as I don't have one - but worth a try, or at least a question of their Yahoo page.
