[Eagleeye]

One hint: for linux (at least, for ubuntu 9.04): you have to make sure, that the libphonon-package is installed. Especially the sources. Else you get the following messages (and calibre will not work):
Traceback (most recent call last):
File "/tmp/init.py", line 43, in <module>
File "/home/kovid/work/calibre/src/calibre/linux.py", line 8, in <module>
File "/home/kovid/work/calibre/src/calibre/customize/ui.py", line 11, in <module>
File "/home/kovid/work/calibre/src/calibre/customize/builtins.py", line 339, in <module>
File "/home/kovid/work/calibre/src/calibre/ebooks/pdf/output.py", line 18, in <module>
File "/home/kovid/work/calibre/src/calibre/ebooks/pdf/writer.py", line 22, in <module>
File "ExtensionLoader_PyQt4_QtWebKit.py", line 12, in <module>
ImportError: libphonon.so.4: cannot open shared object file: No such file or directory

@Kovidgayal: it is possible to include these packages into the linux-binary?