I'm not sure if this product is dead, but I really like Xfbib and there is one simple operation that it doesn't handle: import BibTeX data from the clipboard. Although one can do this simply in a text file by copy/paste from web browser, it would be nice if this operation would be handled gracefully by Xfbib. 

Given a BibTeX ref from Google Scholar: 
http://scholar.google.com/scholar.bib?q=info:hhFp5q4x1Z8J:scholar.google.com/&output=citation&scisig=AAGBfm0AAAAAUd6FDy7yqGuheOGAhwb7huc3Dj9IfWh0&scisf=4&hl=en&as_sdt=0,39

@inproceedings{kastrup2002revisiting,
  title={Revisiting WYSIWYG paradigms for authoring LATEX},
  author={Kastrup, David},
  booktitle={Proceedings of the 2002 Annual Meeting, TUGboat},
  volume={23},
  number={1},
  year={2002}
}

Xfbib could grab these contents from the clipboard and automatically autofill the required fields in 'Add entry'.