i can't help you with top, but i can recommend load-applet, a toolbar app with simple GUI that lists all running processes and how much memory and CPU they're using, and it lets you kill whichever one looks like it's draining your battery. i like load-applet, because it helps me figure out if an app just crashed on me or if the tablet's working and i need to be patient.

(couldn't help but notice you're almost a Senior Member. just remember, with great power comes great responsibility... )