I want to present my business in Facebook social network. Recently I have found out that it will be most convenient to implement iFrames for building my Facebook Fan Page as static FBML is no longer supported by Facebook. Can anyone advice on how I apply iframe to my Facebook Fan Page and make it work properly. Thank you.

Arthur, you're right, FBML is no longer supported. Now you need host your facebook iframe application on your own or paid hosting. There is a number of paid hosting companies you may order services from, but I would suggest you to stick to a free one. I've discovered free hosting for facebook applications recently and it works fine for me.