do ur friend hide from u …
there is easy way to find it ..
so those how r invisible -just avoid it
1. Double Click on the user whose status you want to check.
2. A message window will open.
3. Click IMVironment button, select See all IMVironments, select Yahoo! Tools or Interactive Fun, and click on Doodle.
4. The last step and the most important step. After loading the Doodle IMVironment, there will be two possibilities.
a) If the user is offline, the Doodle area will show “waiting for your friend to load Doodle” continuously.
b) If the user is online (in invisible mode), after few seconds (it can take up to one minute, depending on connection speed), you will get a blank page. So the user is online!
still want to find a way to b invisible .. ya i have one idea
dont use yahoo messanger (i.e installed in ur pc) just use MEEBO.COM or WEBMESSANGER ..