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 Instant Messenger Client that support many of IM Protocol Services, and both works in Mobile Phone and computer desktop, support many of Operating system: windows, mac, and Linux, and also has feature to make remote access your PC from internet browser, you better choose QNext.

QNext is IM Client that supports Windows Live Messenger aka MSN Messenger, Yahoo Messenger, AIM aka AOL Instant Messenger, iChat (for Mac Users), GoogleTalk, IRC (Internet Relay Chat) and also works with Jabber. That why we can called QNext as Universal IM …