In an interesting article in the WSJ there was clearly a trend noted in 2008 for increasing values for numeric domain sales. The article states that among the top 100 domain sales year to date, 10 are short, memorable numeric domains. Among the notable sales listed to date in 08:
770.com $343,208
173.com $302,790
880.com $188,889
11.com $188,889
444.com $178,889