I seem to recall seeing this before online... If this is the case, a simpler URL link would have been a little bit tidier.
Also, this refers to the 3.0 version of Big T, with its DR/+5. The 3.5 version has DR 15/epic IIRC, making the exact tactics less appropriate.
Personally, I'm partial to the flying archer, myself... Only with enough levels and a nice enough bow to actually hurt the darn thing faster than it heals...
Edit: How I found the link: Google "Seven ways to kill the tarrasque" First hit.