I have two groups of the visitors - Clients and Partners. For Partners group I set up special prices. How I can show to everyone seeing website two prices of the product - one for Clients and one for Partners (with small text below: "Push this link to find out how to become a Partner")???
Are you using customer group pricing at all?
I can see making a code adjustment that lists the pricing for all customer groups or I can see you making just another price attribute (for display purposes only) and call it on your template.