If you had Sony PSP and wanna use Google Talk directly from your PSP or other Protocol Messenger Services such as AIM, ICQ, MSN / WLM (Windows Live Messenger) or YM / Yahoo Messenger you can use “Away From the Keyboard Instant Messenger” or AFKIM. It also has built in keyboard.

Download AFKIM for Sony PSP

There are few alternative to use Windows Live Messenger on Nexus One (WLM in Android). Two Alternative below are the best ways that I recommended to your.

Use Meebo for Android
Use eBuddy for Android

Meebo and eBuddy are Multi IM Client that can connect to several Messenger Service at one such as Windows Live Messenger, FaceBook Chat, Yahoo Messenger, AIM, ICQ, and much more. That why you can use it to connect to Windows Live Messenger from your Nexus One (Android 2.1 OS)
How to install Windows Live Messenger Client in Nexus …

If you looking for an alternative IM client for Windows Live Messenger or Chat Client for MSN Messenger in the ways you wanna chat with your friends through WLM, you can try the third party chat client called as emesene
Features of emesene
Emesene compatible with Windows Live Messenger 9 or 16. You can also use webcam, use proxy, tabbed chat, offline messaging, nudges, file transfer, avatar, emoticons (customizable) and many more. Changing theme, smiley, sound, GUI are the features that you can do with emesene.
Version History emesene
The latest version of emesene …