[wp-hackers] Lowest Capabilities possible in Custom Role?

[Robert Lusby]

I'm a little confused creating a custom role in a plugin.

I need the end users to do "ONLY" the following things:
-> Post comments
-> Reply to comments
-> Edit their comment (optional/not required).

They *should not* have access to WP-Admin (so I believe I can't give 
them "read" permissions?

What's the correct roles for this kind of user level? I've had a good 
read of the Roles and Capabilities page on the Codex and still can't 
find an exact answer.

Thanks!
Rob