first i had load-applet installed.
wanted to try cpumem, uninstalled load-applet and installed cpumem.
even after some reboots it didn't show up in the status-bar as it should?!
(don't know if it was under PR1.0 or PR1.1... i will try it again and report! maybe it was just some weird thing going on in 1.0 ^^)

edit: works now. no differences for me. it's just the same. (the screenshot and video capture capabilities make no difference in cpu usage at all. just for users who want a lightweight app (regarding the rootfs usage ^^).)

will try the maemo5-load-applet.