I think that making video games could be useful in a math class. In the process of making games the students would use a lot of formulas to make something happen during the game or in just a regular program making calculations. The only problem with that would be simplifing it where a student would be able to make some sort of project like that with out having to take 2 years of classes to be able to make one. I would suggest that some company make a program sort of like power point where it would be simple push a button and a box appears and you add a formula, something like that would have to be developed if it has not already.
Online chats would not be good in the classroom because the students would not always be talking about the assignment but other social issues they seem are more important the the task at hand.
There is one benefit to asynchronous is that if its a quick easy fix then just texting would be easier then meeting face to face, but in math that is hardly the case. I have tried to help my sister in law over the phone and wished we didn't live so far apart, because its hard to show algebra just by talking it out, and then you can't really know if they grasped the concept or not.
I think podcasts are just a new version of passively delivering information. For myself, I am more inclinded to not watch a video then to not watch a teacher, just because it bores me when there is no interaction with a teacher.
I grew up playing video games, and I will let my kids play them all they want. I have a lazy eye and one of the treatments I was on was to play at least one hour of games a day to try and strengthen my eye. Also, the doctor said that playing video games increases hand eye cordination and I believe that with the newer games are getting more intense with strategy and requires a lot more consentration then Mario Brothers did when I was a kid. Then I have to get my kids to concentrate on study just as hard as they concentrated on there games, and I believe that it would be good for them.