Here is how Ian starts the article:
When you get a new toy like the iPad you want to integrate it with the rest of your setup which for me means getting it to play nicely with Windows Media Center. Out of box there is no easy way to get recorded TV across to the iPad but it’s not completely impossible. I am sure there are many different ways of tackling the problem but I am just going to look at one solution for now. There method I am using is one that we discussed on The Media Center Show a couple of weeks ago called Aleesoft, this application is designed to convert video files to iPad, iPhone or iPod formant.
Aleesoft is pretty simple to use, you just select the files or folders you want converting and it will create an mp4 versions of the files. If you have a ripped DVD you can point Aleesoft at the folder and it will convert the vob files to mp4 which you can then add to iTunes and send to your device, it will also convert other video files and this is where it can work with Media Center.
You can read his full article here and please leave him some comments on what you use, if anything.