oh, i think i should write it to the comment, that logout/login can solve windeco probs. you are the second person telling that
yasp:
[link]or if you use ubuntu, you can install it with synaptic
weather: i use cwp
[link]it is really good customizable
clock: my clock just shows the time, i´ve choosen a smooth font (now using frutiger condensed) and set the colour to a darker value than other panel text, so it looks smoother and isn´t too dominating