I posted this in another thread as well...however I have yet to see any of the news blogs pick up on this. While the price, overall appearance remains the same on the Airport Extreme, there seams to be a significant difference in the radio performance.
According to the FCC reports, there is a significant difference in the power output of the g/n radios at both 2.4 and 5ghz...
Previous Version...(follow the link, then click on the "Report" link)
http://goo.gl/B8PIu
New Version...
http://goo.gl/3yKRl
Previous Version...
freqency range mode output power dbm output power watts
2412-2462 802.11b 24.57 286.42
2412-2462 802.11g 21.56 143.22
2412-2462 802.11n(ht20) 21.17 130.92
5745-5825 802.11a 23.07 202.77
5745-5805 802.11n(ht20) 22.17 164.82
5755-5795 802.11n(ht40) 21.44 139.32
New Version...
2412-2462 802.11b 24.10 257.04
2412-2462 802.11g 24.88 307.61
2412-2462 802.11n(ht20) 24.11 257.63
5745-5825 802.11a 25.14 326.59
5745-5805 802.11n(ht20) 25.28 337.29
5755-5795 802.11n(ht40) 25.94 392.64
This should mean a fairly significant increase in range with the new model. I would imagine these figures would carry over to the Time Capsule as well.