Not really sure which area to put this question in but I suppose GD is as good a place as any 
What is a decent free web-based file sharing site for the purpose of uploading MP3 audio files from lectures so that all students have access?
It would be useful if the site would send an email to subscribers when a new lecture is uploaded and that it should keep the files in order and be user friendly. The files should only be accessible to people who have been granted access, not general public.
Only one user needs to be able to upload but the ability for others to do so could be useful if the allocated recorder misses a class for example.
EDIT: What would the recommended minimum upload speed be for such purposes (usual file size 2-300MB recorded at 128kb/s)?
Thanks in advance.

What is a decent free web-based file sharing site for the purpose of uploading MP3 audio files from lectures so that all students have access?
It would be useful if the site would send an email to subscribers when a new lecture is uploaded and that it should keep the files in order and be user friendly. The files should only be accessible to people who have been granted access, not general public.
Only one user needs to be able to upload but the ability for others to do so could be useful if the allocated recorder misses a class for example.
EDIT: What would the recommended minimum upload speed be for such purposes (usual file size 2-300MB recorded at 128kb/s)?
Thanks in advance.