Channels are still the terminology used on 2.4ghz. Look at your Wi-Fi network. It still uses channels. I am using channel 11, which happens to be 2.462 ghz, or 2462 Mhz. How would the system know which frequency to look for? Because there are allocated channels within each system to assign. This is not much different from 72 mhz, and if you look at the spec for 2.4, you'll see that they are centered on specific frequencies. I don't have it at hand, but I believe the width of each channel is 1 mhz wide and spaced 5 mhz apart.

I agree that you don't choose a channel like you did with 72, but you leave it up to your system to do that. Also, if you are using DSS, vs. FHSS, you are going to use those two channels for the duration of when your Tx is powered up. Take a look at this article too. http://www.rcmodelreviews.com/dsm2flaw.shtml

In the case of Assan V2, it picks 2 channels, one at the bottom of the spectrum and one in the range. Then if the one in the range loses packets, it switches reception. Problem is that no one knows if the bottom channel is the same for all receivers.

One good thing I like is the fact that it is digital, so that even if you are on the same frequency, if the packet is not assigned to your receiver, the receiver will not do anything with it. Problem becomes when you get blanketed and you can't get your receiver to listen to your Tx.

I know this is getting way offbase, but there are some things to think about when choosing a system.
Curtis