Okay, here are the results of my WiFi Test. I am using WiFi Manager on the DX and inSSIDer 2.0 on the PC (NetStumbler is not compatible with Win7).
802.11 Mode : Mixed 802.11n and 802.11g
802.11 Band : 2.4GHz
Channel Width : 20 MHz
Security Mode : WPA-Personal
Sitting at the computer where the wireless router is connected (2 ft):
DX signal strength: -54dB
Asus Eee PC signal strength: -15dB
Living room (10 ft , 1 wall in between):
DX signal strength: -63dB
Asus Eee PC signal strength: -49dB
In the Kitchen (60-70 ft, farthest spot in the house from the router, 2 walls):
DX signal strength: -87dB
Asus Eee PC signal strength: -61dB
Back Bathroom (45 ft, other side of house, 3 walls):
DX signal strength: -85dB
Asus Eee PC signal strength: -68dB
It should be noted that when I put the DX basically touching the router, the best signal I could get was -54dB.
To the OP, I thought this was an interesting subject that I had been wondering about for some time. I stumbled on this thread today, and I hope you are still subscribed to this thread so you can see my test results. This is my input to the Droid X WiFi signal strength. I hope others will respond with their results too.