Google just removed some 21 apps from the Market in the last day from a publisher going by Myournet for doing all sorts of naughty things to your device. Offenses include attempting to root your phone, uploading phone information (including IMEI) to who-knows-where, and -- most egregiously -- adding a backdoor that allows additional code to be pulled down and executed.
http://www.engadget.com/2011/03/02/g...h-big-downloa/