yes, however if the person you are texting does not have texting on their phone plan they will be charged.
Yes, Windows Live Messenger is a free program.
Yes, it is available for free (I think). No, It Is Free Try It I have Tried it lots of time
I have the enV and it doesn't show any extra for using messenger. I think it either a) is considered unlimited texting (if you have it) or b) it might be free
Windows live messenger is free to everyone. It has nothing to do with your mobile network.
Yes, It is absolutely free!
Yes, if you live in the UK you pay £5 a month on top of the £10 credit for texting/calling.
yes
Yes
yes
MSN Plus Live, a Windows Live Messenger extension, can be downloaded for free from the Messenger Plus official site. There one can also download animations and messenger skins.
Yes.
Messenger FX is an instant messenger which can use an existing Windows Live Messenger username and password to log in. It is free to download from many sources online.