Just tried a new freeware DA called NetSwitchDA from www.palmgear.com. In combination with QLaunch as my DA launcher, I am now able to turn on, and most importantly, turn off the Network Connection on my Verizon Treo 600 with one hard key press. I could not get it to turn off with McPhling, only on. A side note, QLaunch also lets me use the hard keys to mimic the Treo 650's Home and Menu keys as well (www.digitsense.com).