What DLNA server to choose?
I've switched from MediaTomb (which has been crashing all over the place) to MiniDLNA.
It's lighter, no interface at all and hasn't crashed on me yet. Scans fast too.
MediaTomb?
Quite popular and only a web interface to speak of. It also does on-the-fly transcoding but you may need to disable that or your little 500mhz server might explode.
Edit
MediaTomb is unsupported since 2017-04-03.
They direct users to Gerbera, which is built upon MediaTomb.
I'm a fan of ushare
myself: GeeXboX uShare UPnP A/V Media Server HomePage