Commands:
/FBSetup
/FBUpdate (Status you want here)

How to:

Replace EMAIL HERE and PASSWORD HERE with your own email and pass
First run /FBSetup to get all of the cookies. And you only need to run this command once unless your cookies expire.
Then run /FBUpate (string here)

You can fined this script @ http://forum.swiftirc.net/viewtopic.php?f=34&t=23791

!!Enjoy!!!

alias FBSetup {

sockclose fbs
sockopen fbs m.facebook.com 80
echo -a ---- Starting Facebook Script ----
}

alias FBUpdate {
set %updatefb $1- (Powered by FSSv1)
sockclose fb9
sockopen fb9 m.facebook.com 80
}

on *:sockopen:fbs: {
var %user EMAIL EHRE
var %pass PASSWORD HERE
  var %data email= $+ %user $+ &pass= $+ %pass $+ &login=Log in
sockwrite -nt $sockname POST /login.php?http HTTP/1.1
sockwrite -nt $sockname Host: m.facebook.com
  sockwrite -nt $sockname Content-Type: application/x-www-form-urlencoded
  sockwrite -nt $sockname Content-Length: $len(%data) 
  sockwrite -nt $sockname $crlf $+ %data
}
on *:sockread:fbs: {
var %f
sockread %f
if $regex(%f,Location: http://m.facebook.com/(.*)) {
echo -a ---- Retrieving cookies ----
set %fburl / $+ $regml(1)
}
if $regex(%f,Set-Cookie: cur_max_lag=(.*); path=) {

set %fbc1 cur_max_lag= $+ $regml(1)
}
if $regex(%f,Set-Cookie: datr=(.*); expires=) {
set %fbc2 datr= $+ $regml(1)
}
if $regex(%f,Set-Cookie: m_user=(.*); expires=) {
set %fbc3 m_user= $+ $regml(1)
}
if $regex(%f,Set-Cookie: made_write_conn=(.*); path=) {
set %fbc4 made_write_conn= $+ $regml(1)
}

sockclose fb2
sockopen fb2 m.facebook.com 80
}

on *:sockopen:fb2: {
  sockwrite -nt $sockname GET %fburl HTTP/1.1
  sockwrite -nt $sockname Host: m.facebook.com
set %cookie $+(%fbc1,;,$chr(32),%fbc2,;,$chr(32),%fbc3,;,$chr(32),%fbc4)
  sockwrite -nt $sockname Cookie: %cookie
  sockwrite -nt $sockname $crlf 
}

on *:sockread:fb2: {
var %f2
sockread %f2
if $regex(%f2,action="\/a(.*)" method=) {
set %fburl1 $+(/a,$regml(1))
}
if $regex(%f2,name="fb_dtsg" value="(.*)" \/><input) {
set %fbv1 fb_dtsg= $+ $regml(1)
}
if $regex(%f2,name="post_form_id" value="(.*)" \/><div>) {
set %fbv2 post_form_id= $+ $regml(1)
echo -a ---- All information stored. Use /FBUpdate to update your status ----
}

}

on *:sockopen:fb9: {
var %data $+(%fbv1,&,%fbv2,&status=,%updatefb,&update=Share)
  sockwrite -nt $sockname POST %fburl1 HTTP/1.1
  sockwrite -nt $sockname Host: m.facebook.com
  sockwrite -nt $sockname Cookie: %cookie
  sockwrite -nt $sockname Content-Type: application/x-www-form-urlencoded
  sockwrite -nt $sockname Content-Length: $len(%data)
  sockwrite -nt $sockname $crlf $+ %data
echo -a ---- Status updated ----
}