I have just uploaded version 2.1 of the LaTeX ucs package to CTAN, so it should appear there within the next few days. Some small bugs have been fixed, and mappings for several characters, mostly musical notes and special arrows, have been added. A big thank you goes to Ralf Meyer, who has contributed considerably to this release.
I am always happy to receive bug reports, wishlists, and contributions. Just get in touch with me.