Can I be signed on to the desktop AIM service and AIM 2.0 for Palm i705 with the same screen name at the same time?
No; if you try to sign on to AIM 2.0 for Palm i705 while you are already signed onto AIM on your desktop, your current session (in this case, AIM on your desktop) will be terminated and your new sign-on (in this case, AIM 2.0 for Palm i705) will take precedence. (Your current session will always be “terminated” by your new sign-on.