if it is updated to the ios 5
Yes. IMessage is not the same as the text messaging you have in something like a Samsung phone. iMessage only works with other Apple devices that have iMessage.
From a apple store or on apple.com
$199 for a 16GB $299 for a 32GB
from June 24 on, 99$
If you have iMessage installed you can only iMessage other iDevices that has iMessage installed on them. If someone has an iPad 2 but not with 3G but has an iPhone, then the iMessage will go there iPhone.
Not yet
$400-$500
No. iMessage is only available for Apple devices.
To find your iMessage phone number, open the Settings app on your iPhone, scroll down, and tap on "Messages." Then, select "Send & Receive." Your iMessage phone number will be displayed at the top of the screen, under "You can be reached by iMessage at." If you don’t see it, ensure that iMessage is enabled.
IMessage is some thing were u can chat to people who have iPhone iPod or iPad! :)
You cant unless a non imessage member texts you then it is green
If you have or can install the iMessage software on it you can but if not you can't. You can only iMessage other iDevices.