Couldn't sleep from what happened yesterday, so I thought I explain a allready suggested idea and save the XoloX guys some investigation time. Maybe it helps to spread all kind of information with gnutella, Moak

More default extensions (upddated 12. Sep)
The following extensions might be usefull to be shared:

ace (file compression, http://www.winace.com/)
arj (file compression, http://www.arjsoft.com/arj.htm)
gz (Unix Gzip compressed file, often used in the Unix world)
m3u (Winamp Playlist file - might be usefull for full albums, http://www.winamp.com/)
pcx (picture format - often used in the past years)
pdf (AcrobatReader Document Format - common information container, http://www.adobe.com/products/acrobat/)
png (picture format - told to become JPG replacement for websites)
ps (PostScript file - common information container in the Unix world, similar to doc in the Windows world)
rar (very common file compression, http://www.rarsoft.com/)
tga (picture format - very interesting for 3D artists, stores RGB and alpha channel)
tgz (Unix Gzip compressed files, VERY common in the Unix world!)
tiff (high quality picture format - often used by artists & designers)

Usefull Links:

[1] File Compression Formats http://www.faqs.org/faqs/compression...section-2.html
[2] Graphic File Formats http://www.why-not.com/articles/formats.htm
[3] Multimedia File Formats http://www.lib.rochester.edu/multimed/contents.htm
[4] Internet File Formats http://www.learnthenet.com/english/html/34filext.htm
[5] File Format Library (great!) http://www.informatik.uni-frankfurt.de/~amueller/