th The Who’s Who in Fluorescence 2008 is the 6 Volume of the Who’s Who Series. The previous five volumes (2003 - 2007) have been very well received indeed, with 1000’s of copies being distributed around the world, through conferences and workshops, as well as through internet book sites. Recently, the WWiF Volume was th disseminated at the 10 MAFS conference in Salzburg, Austria. The Volume was very well received indeed. We subsequently thank Professor Otto Wolfbeis for help in disseminating the Volume at the MAFS venue. This new 2008 Volume features some 418 entries from no fewer than 38 countries worldwide, as compared to 405 entries (35 different countries) in 2007 and 366 entries in the 2006 volume, respectively. We have received 31 new entries this year, and deleted 18 entries that were not updated by contributors from past years. In 2007 some 106 AIM numbers were submitted and listed, 88 the year before. This year, the number submitted has risen again to 129 entries, greater than 30 % of all contributors. In addition, the Volume has a continued strong company support, which will enable us to further disseminate the Volume in 2008-2009. In this regard we especially thank the instrumentation companies for their continued support, where without their financial contributions, it is likely that the Volume would not be the success it is today. The new WWiF website was also launched in August 2007. The website features all the latest WWiF templates and submission information.