Just got my USB Serial adapter, doing the wire now... so will double check per uboot..  but ssh'ing into the TP2 I see the following. And yes I did  step 6 of kmihelich instructions 

$this->bbcode_second_pass_code('', '# fw_printenv
bootcmd=bootp; setenv bootargs root=/dev/nfs nfsroot=${serverip}:${rootpath} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; bootm
bootdelay=5
baudrate=115200
mainlineLinux=yes
arcNumber=4101
# uptime
 17:47:23 up 19:49,  1 user,  load average: 0.00, 0.01, 0.05
')