For the easiest of my candidate projects (dlna server), I found this post: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=35&t=8607
I have already installed, configured and used successfully minidlna on OpenSuSE, until I installed serviio, much more friendly and with some additional features, like video streaming for instance.
There is a general forum for Media and Games on Raspberry Pi:
I have just downloaded Raspbian and will try to boot the Raspberry Pi from an 4Gb SD card with the image. The uncompressed size of the image is 1.8Gb, so unfortunately I will not use one of the several 1Gb unused SD cards I have. I want to make it as cheap as I can, It will be more in line with the Raspberry Pi spirit, with the spirit of my blog and with the spirit of my wallet.