You can view the Wayback Machine's archive of Minds Wanted here:
https://web.archive.org/web/20151127043531/https://mindswanted.co.uk/
Agreed, the Smiler hype and campaign was very well orchestrated - especially considering it was Merlin's own IP. I think it speaks volumes still that it's popularity hasn't waned since the unfortunate accident either.
The Swarm's campaign I also loved, but it's interesting how that just didn't seem to strike a chord so much with people vs Smiler... maybe because people are/were sick of the "end of the world" and destruction rhetoric, where as the mysterious and different promo for The Smiler was more engaging.
I was young at the time, but on a similar note I remember vividly the Oblivion hype on park, in particular the security guard actors positioned along the perimeter construction fence.