Got this from their exclusive offer email.

Collect your FREE Benefiber sample at any Pulse Pharmacy.

Benefiber is a dietary fibre that is clear and dissolves completely in water. It’s grit-free, glug-free and taste-free so you can mix it with coffee, tea, juice, milk, yoghurt, ice cream, baked goods and your favourite recipes. Benefiber makes taking fibre easier.

Valid until 16/12/07

Looks like you need to print out the voucher and go to the actual store to get the free sample. Their website has a store locator. Looks like it is only available for those in NSW and Victoria.