Wagtail is yet-another-CD-ripping-and-encoding-wrapper. Wagtail is designed for bulk encoding, large collections and for people who take their encoding seriously. Wagtail won't suit everyone. The learning curve seems steep but it's really not that bad, to get going read the quickstart guide and you can always delve into the Details later.
Features:
Handles CD ripping, CDDB (including submission) encoding, tagging and moving of files.
Supports re-encoding of existing files/playlists.
User choice of software for each stage of processing and encoding.
Client/server architecture. Clients send files to the Server to be encoded. Both tasks can be performed by a single machine.
Files to be processed are Queued on the server, i.e. no need for the client to wait for the server to Catch Up before sending more files.
Server can support multiple formats and quality levels.
Server supports multiple 'tasks' which define the encoded file naming scheme, arbitrary re-processing instructions, format choice restrictions etc.
Flexible naming rules for files and directories. Names can be based on file properties. Multiple options can be specified for each attribute with the most suitable one being chosen.