PodCasts are audio files that can be sent an iPod or MP3 player. The great thing here is that learners can listen to the audio file while travelling or whenever is convenient for them.
Why not consider creating and sending a PodCast to learners:
--Before the workshop, explaining what they can expect during their time with you during their workshop.
--Before the workshop outlining some of the content and asking learners to carry out specific tasks prior to their workshop eg for a customer service workshop ask learners to note good and bad service they receive over the next few days and bring these experiences with them.
--Post workshop with additional resources eg web sites, reading material, a bonus idea or technique they can use in the workplace etc.
For information on creating a PodCast go to:
http://www.squidoo.com/learntopodcast/