questionsis there any sort of app-watcher for the mac app…

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Appshopper works for the Mac too. http://appshopper.com/mac/all/
Just tell it which apps you want, and it emails you when the price drops. Also, there's Store News, which is an app. I have it, but it never gets opened. appshopper works just fine for me.

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@rprebel: I didn't know AppShopper did Mac App store stuff as well, thanks! I'll have to see if I can figure out how to peruse it on my phone when I actually have service. If not, always the website. I'll give Store News a shot as well