Russ has made a bookmarklet for sending SMSs from any browser. The default Javascript calls up two prompts, one for the phone number, and one to confirm the message text. If some text is selected on the page, it automagically pastes it into the second prompt and truncates it to 120 characters to send it as an SMS. You can even tweak the Javascript a bit. You can edit the first variable called ?phone? which will default the number so you don?t have to type it in all the time. If you want to speed up the process, you can change the conf var to false, and it?ll just take the first 120 characters of whatever you?ve selected, and send it off to your phone. Cool!
If only Yahoo! would introduce India in its list of SMS services.

Add the bookmarklet from his blog here