Nik Peachey runs a nice blog for learners of English to encourage learner autonomy, and it's called Nik's Daily English Activities. It's worth exploring this site as a teacher starting to use online resources and tools. Experiment with his tips yourself to get a feeling for what online learning is before you and your students start exploring media for tasks and projects.
In one entry this past May, he recommended that learners subscribe to a poem a day and record it as a daily pronunciation exercise. Learners can check the pronunciation of words and phrases on another website and then record the poems themselves using software they download to their computer. I think this is a lovely idea for a short daily practice session. Here is the post, with all of the links you need: Poems for pronunciation.
The idea of students recording their own voices goes back to language lab days, doesn't it? But these days students can expand on this activity. Once they feel comfortable recording themselves, they can go on and actually make a podcast themselves for others to listen to outside the language lab and even outside their course group - thanks to Web 2.0.