A simple script to download your bibtex library from citeulike along with your personal PDFs. PDFs are named according to the citeulike record number, and a Local-Url field is added so that Bibdesk (and others?) can locate the files.
The script needs a file called .citeusync in your home directory with your login, password, and the path to your PDFs on successive lines. E.g.
myusername
mypassword
/Users/myusername/Documents/Papers