If you've owned a house in Austin over the last year, I am pleased to announce that you are 0.33% richer based on the new value of your home. Between February, 2007 and February, 2008, the average single family house in Austin is up 1/3 of a percent to $233,015.While this may not seem like good news at first, it makes Austin one of the strongest real estate markets in the country. During a period when national home prices fell 10.7% and housing in markets such as Miami, Phoenix, and Las Vegas fell by . . .