If some one block you on your MSN or Yahoo Messenger and you want to check while your friend
he/she is online or offline then you can use this
MSN Block Checker
this website also offer Yahoo Block
Checker
You can also check ICQ and AIM messenger block ckecker
he/she is online or offline then you can use this
MSN Block Checker
this website also offer Yahoo Block
Checker
You can also check ICQ and AIM messenger block ckecker