My favourite aspect of the SPGM Gallery extension for Joomla 1.6 is the 'thumbnail generator'. I'm able to quickly upload images into the directory via FTP then login to the admin panel and selec 'generate thumbnails'. A very, very, very useful and time-saving option.
I would thoroughly recommend SPGM Gallery to anyone looking for a quick, reliable and dependable image gallery. It has accessible code and I'm surprised so much is offered under a non-commercial licence.
A great job to the whole team and thanks so much for all your hard work - it certainly shows!