I'm using netspeed applet on Ubuntu 11.10 with Unity. The real fact is that even though using Unity I run the gnome-panel. I only have the bottom-panel with the window list and netspeed applet. So I'm using the global Unity menu-bar (the default with indicators,...) plus the old gnome-panel for bottom-panel, where I can continue using previous applets such as netspeed:
i netspeed - Traffic monitor applet for GNOME
i gnome-panel - launcher and docking facility for GNOME
I can't live without bottom-bar with window list.
NOTICE: The way to open "properties" menú on gnome-panel --to add applets, configure panel, etc-- is a little tricky (at least in my case). I have to press ALT+Left_Mouse_Btn+Right_Mouse_Btn.
Note: I configure gnome-panel as startup application in Unity to load it each time Unity starts.
Hope this helps!