I'm working on it. Progress is a bit slow due to lack of time, Maemo/Linux development experience, or C knowlege in general.

But at least I have meanwhile a working build environment, Yellownotes applet builds without errors and I even managed to put a Tracparency box in the preferences dialogue and save/retrieve its value from the config file.

Now I just have to figure out how to use this value to actually set the transparency. :-) Have to check how e.g. homediskfree applet is doing this.

So maybe next weekend I can post a first working result.