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
')