APK Downloader
APK Downloader is a Chrome extension that does exactly what its name advertises -- download APKs from the Android Market site. Getting the tool up and running takes quite a bit more work than your average browser add-on, requiring you to edit the Chrome shortcut to disable SSL error warnings, but it's hardly rocket science. This should make sideloading apps much easier and give you a chance to try software yourself, even if a developer seems to think its app wont work with your device. There is, of course, room for abuse and it does violate the Market's ToS -- so try it at your own risk. If you're unfazed, hit up the source link for complete instructions.