Tagul has been reviewed by Killerstartups recently. Despite the review being concise, the author precisely stated that Tagul clouds are eye-candy that make your site's visitors experience more joyful. That is exactly what Tagul clouds are intended for.
That review attracted significant attention to the service and by this moment Tagul have virtually a hundred users signed up. Probably it is a little more attention than I expected it to be at the early stage (the service has been up just for 1 week already), but anyway it is very pleasant to get such a positive feedback.