Seattle-based real estate web site Redfin reported this morning that the firm saw a big traffic spike, as a result of the Apple iPad launch. According to Redfin, the boost came as a result of the firm's application being pre-installed on all Apple store iPads. Redfin said big spikes came at 7 a.m. and 10 a.m. on Saturday, when the stores first opened on the East Coast and West Coast.