Neat! In 2010 Ruger is going to be offering the Mini-30 with factory 20 round magazines. From the Ruger blog:
The popular Ruger Mini Thirty® rifle is now available with 20-round magazines. Chambered for 7.62×39, the Mini Thirty is an ideal autoloader for deer-sized game. Featuring the reliable action of the Ruger Mini-14® series of rifles first introduced in 1974, the Mini Thirty is simple, rugged and reliable, hallmarks of all Ruger firearms.
I like the Mini-etc line of rifles, and factory 20 rounders would go a long way towards making the 7.62 version a legit home defense gun.