Just checked CompUSA.com They have silver and blue available. You can add both to your cart, but only blue will ship within 24-48 hours. Silver says 2-4 weeks. So, if you want a blue mini go grab it while its still available.

Link (http://compusa.com/products/products.asp?N=0&Ntt=ipod%20mini&Ntk=All&Nty=1&D=ipod%20mini)