A year and a half after Skype launched a version for the iPhone (March 2009) it finally released Skype for Android for customers outside the US. In the US Skype has already been available for Verizon customers for a couple of months, but if you’re with a different US network you’ll still be out of luck.
Even outside the US, Android versions before 2.1 are not supported. My Google Ion which comes with Android 1.6 got this message:
Sorry, Skype is unavailable for your mobile. We add new handsets all the time so check back soon.
This makes me even keener to find out when an Android 2.2 upgrade will become available for the Google Ion, as announced in May 2010.