I don't like old-style numerals (1234567890), and I don't like typefaces where the ten digits are not equal width. One of the cool features of OpenType is that a typeface can include old-style numerals for people who like them, but modern-style numerals (1234567890) for normal people.
I wonder how long it will take before the new Vista fonts are leaked to a substantial number of XP and Mac machines. Most of them use old-style numerals; Microsoft's research said that they are easier to read, but I don't think they are at all. I think they're distracting and unpleasant.