wmsysmon 0.7.7 has been available for more than three years now. :-) I do not use a wm with this dock thingy, so I have not tested it.
wmsysmon 0.7.7 suffers from the same problems as wmsysmon 0.7.6. This means I'll have to port my own patch to the new version.
Version 0.7.7 is now in Portage (with my own patches as well), thanks for the submission!