I called Iphouse, and they confirmed that my DSL never gets to the top speeds advertised because my condo is located in what is technically known as the "sucky" part of the DSL line, and that they indeed don't have fiber internet yet. See how great they are? So, my plans to get faster DSL is on hold until I see how this fiber Internet thing shakes out. Maybe Iphouse will offer it eventually, and Consumer Reports* says that Verizon and AT & T are offering it in some areas (not here of course), so in theory a consumer-friendly price war could ensue. With my luck, though, the condo association won't allow it (I think there has to be a box outside the building or something. Anyone know?)
*Save a bundle. Consumer Reports. February 2009;74(2):22-25. See your friendly local librarian for more information.