hi all, how you must configure Apache 2.2 or mod_python?, to avoid the following error:
MOD_PYTHON ERROR
ProcessId:      5399
Interpreter:    '127.0.1.1'
ServerName:     '127.0.1.1'
DocumentRoot:   '/var/www'
URI:            '/cgi-bin/wps/'
Location:       None
Directory:      '/usr/lib/cgi-bin/'
Filename:       '/usr/lib/cgi-bin/wps/'
PathInfo:       ''
Phase:          'PythonHandler'
Handler:        'pywps'
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1537, in HandlerDispatch
    default=default_handler, arg=req, silent=hlist.silent)
  File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1206, in _process_target
    object = apache.resolve_object(module, object_str, arg, silent=silent)
  File "/usr/lib/python2.6/dist-packages/mod_python/apache.py", line 696, in resolve_object
    raise AttributeError, s
AttributeError: module '/usr/local/lib/python2.6/dist-packages/pywps/init.pyc' contains no 'handler'
this is for a configuration (ubuntu (10.4)) for AMD64.
thanks for your answers
In my case, changing 

PythonHandler pywps

to 

PythonHandler wps

in the .htaccess (or the apache configuration file) fixed the problem. 
I think that the file pywps.py has been renamed to wps.py, and this gives problems, since the sample configuration file has been left with the old name.
correct configuration for apache and mod_python