This is very cool. And it has Korean. When I tried to do Korean in Rosetta Stone, numbers are where I dropped off. With that said, it would be nice if there were a learning mode for people who don't know the numbers to learn them through this.
Korean has two sets of numbers! (Il, e, sam... and hana, dul, set, ... ). When I worked for a Korean company, I heard the first more than the second, but I could never work out what the right context was for each set of numbers. I could usually pick out the numbers up to 20 or so, which was all I really needed in a work context.
I am planning to add this! If you are interested, be sure to get on the list to know when it's released.