Users should be able to specify PYTHONPATH for plugins.

In the log-file I get:

2006-12-16 20:27:03,494 WARNING services.service_manager:86 failed to import services.meldembed = pida.services.meldembed:Service
Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/pida/core/services.py", line 72, in __load_entrypoint
    cls = entrypoint.load()
  File "/usr/lib/python2.4/site-packages/pkg_resources.py", line 1830, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/usr/lib/python2.4/site-packages/pida/services/meldembed.py", line 49, in ?
    import meld.paths as paths
ImportError: No module named meld.paths
[...]

... but meld is installed. The problem is that meld's py-files are installed in /usr/lib (on Gentoo) instead of /usr/lib/python-2.4/site-packages and /usr/lib isn't in PYTHONPATH.
Therefore I would suggest a variable in the configuration-file where someone can add arbitrary directories which are being added to sys.path during the next startup.