Google Raising App Size: 4GB Replaces The Old 50MB Limit
Each app can have two expansion files, each one up to 2GB, in whatever format you choose, and the Market will host the files to save you the hassle and cost of file serving. Users will see the total size of your app and all of the downloads before they install/purchase. According to Google: "
On most newer devices, when users download your app from Android Market, the expansion files will be downloaded automatically, and the refund period won’t start until the expansion files are downloaded. On older devices, your app will download the expansion files the first time it runs, via a downloader library which we’ve provided below.
While you can use the two expansion files any way you wish, we recommend that one serve as the initial download and be rarely if ever updated; the second can be smaller and serve as a “patch carrier,” getting versioned with each major release."
Now, get to work on those huge apps!