I began looking into creating an icon pack again and found out there didn't seem to be any resources for getting the app details for creating it. If you use one of the template systems they have an email option where it emails the pack developer the request. I don't think this is great really, if your pack becomes popular then you could have to sift through lots of email.
Over the last month I've been putting together a new site with an Android app counterpart. It's called Icon Pusher and it's a utility for icon pack developers for getting app icons and their package/component names. So far the app sends all the app information to the server, but the idea is to be able to integrate it into icon pack templates to allow users send their requests directly to the site instead of sending email.
Icon Pusher App
The idea is you install the app (from Google play) onto your phone and submit the apps you want to push to the site, this will send the package and component names needed for the icon pack then the site goes off to get the icon from Google.
Icon Pusher Website
The website simply displays all the submitted icons and provides the XML needed to copy into the android icon pack files. The ideal situation would be to integrate it into the icon packs themselves, so the icon requests would be direct without needing the app at all.