Yahoo! Mail is going to provide unlimited space on its 10-year anniversary celebration in May 2007.
But I still miss the free POP3 access although Yahoo! Mail provide the same to its non-US customers (those who aren’t having email@example.com but over firstname.lastname@example.org or email@example.com).
Yahoo! Photos is already providing unlimited space for photo storage. There upcoming Yahoo! Photos beta contains very much enhanced AJAX rich interface (which including other features, helps you on saving bandwidth by loading as many photos as many are needed).