Hi Lazy, I already upgrade my 3gs FW 3.1.3 to FW 4.0.1, but when I go to Safari and type http://www.jailbreakme.com then press done then the screen appeared the slide to jailbreak same as your show in step 1.
But, when i slide to the right and wait for a while see nothing happen. ( connected FiWi with high speed)
Please give me some idea.
because the web jailbreakme.com 's server is too busy to get everyone normal, pitoukhmer check your wifi connection, reboot your device, meanwhile Comex has updated the website, try again
go to setting/safari, clear history, cookies and cache. retry, it will works!