So far, Skype has not a fully version for Android. I have tried Skype lite before. But that is just like a kind of IM only. I can't make a voice call via that directly. But there are some third party clients can do voice chat in Android. I tried one of them, Fring. It supports Skype(Well, it also supports MSN Messenger, ICQ, Google Talk, SIP and Twitter). However, there are some disadvantages. Firstly, you need to get a Fring account. I believe all skype calls need to go through it and they will hold your skype credential. Secondly, you cannot use SkypeOut and SkypeSMS too. But it is better than Skype Lite, at least I can call my friends who are online with a Skype account.