Alex Neth has outdone himself with his new Craigslist mashup which he named Cribq. It combines Craigslist real estate listings for Chicago, SF, Chicago, Boston with Google Maps... but it doesn't stop there. What makes this Craigslist housing mashup different from others are the tools that Alex has built into the site: Hotlists, notes, the ability to edit listings, and you can search within the map. It also uses birdseye views from Virtual Earth and integration with Walkscore, an interesting Google Maps housing tool which gives you the "walkability" of a given address. Both are found as tabs below the Google Maps view at the bottom right. Alex's own housing search spawned the creation of Cribq, as Paul Rademacher's need for housing in San Francisco spawned the first ever Google Maps hack that also mashes up with Craigslist (HousingMaps).