It could have been removed by Apple or the app developer, there's no way to tell. In any case, unless you have the app saved in iTunes on your computer, there's no way to download it to your iPad.
I'm pretty sure the Dev of this app was a super moderator at iPadForums.net
Our sister site. I can't find it in the App Store or the cloud (I used to have this app). So the dev must've removed it.