Not just another in a seemingly endless flow of mixtapes from the Houston-based rapper/producer Chamillionaire, Houston We Have a Problem! is, as the title suggests, heavy on the beef. After a brief spoken intro, the album kicks into high gear with a freestyle taking potshots at fellow Texan Paul Wall by name; amusingly, the very next track is a new track by Wall, "Sittin' Sideways." The album continues in that point-counterpoint vein for most of its length, with guest star turns by Wall, Slim Thug, Mike Jones, and just about everyone else active in the Houston scene. There's even a nod to local hip-hop history with an updated version of the Geto Boys' "Mind Playin' Tricks on Me," the first great Texas rap single. Those wanting either an introduction to Chamillionaire's production and rapping gifts or a quick overview of the on-fire Houston hip-hop scene should start here.