bateman_ap - 1:00 pm on Mar 20, 2006 (gmt 0)
When we moved into an office a couple of years ago this question was brought up. We ended up installing this hollow tubing throughout alongside Cat6 for when we wanted to finally install fibre. Apparantly they could push the fibre through without having to take up the floor again. The cost was literally pennies and was quite a good future proofing idea.