The first phase of the project will allow visitors who have made a booking via the online travel agency to browse a Lastminute.com-branded microsite to download the MP3 podcasts.
Visitors will also be able to download maps and guides when they purchase each tour. The MP3 files are typically around 10 to 15MB in size.
PocketVox will have guides for 26 cities and 140 individual tours by July 2007, mainly in Europe and North Africa.
A further ten cities in North America and the Far East will be added by the end of 2007.