Apple ipod

Is that the next Apple operating system capable of performing 4.0 in the second generation iPod Touch?

Yes, but it will work. Here is the official statement from Apple's website. Phone Compatibility iPhone OS 4 SO 4 work with the 3G iPhone 3G, the iPhone and touch of the second and third generation iPod, this summer, and autumn with the IPAD. All functions are compatible with all devices. For example, multitasking is only available with iPhone 3G and the Touch of third-generation iPod (32 GB model and 64 GB from the end of 2009).

Apple iPhone OS 4.0 – Hands-On Pt 1