If people are interested in one of those topics, and there's not enough talks, I can try to do a talk myself, but I'll also need some technical help about how to setup the client side talk stuff here...

Topics:

* how to build a debian binary archive (which can be then used for both free or non-free personnal repos, shared or not)
* how to use Coco/R to generate a simple parser, and why would one prefer to use a tool rather than implement a parser (for tech part, I'd basically need to refine my linuxfr's "journal" but that should be doable, and for the why part, it should not require much effort)
* or I can talk about setting up a PXE architecture, maybe even dig in my old stuff to mention how to do that for beaglebone black systems (means: Das-UBoot firmare instead of BIOS-compatible hardware)

The one that would require the least work for me is probably the Coco/R stuff, but it's also the more specialized (can only interest developpers of course, but is not limited to C++, people can use it with Java or C# too).
PXEs are neat, but are pretty simple when you understand the basics. For a talk of 15min, that may be a good choice thus.
Debian binary packages are neat (at least imo), but are quite specific (only debian and children) and I would not speak about the source packages, because those are... well, complex, and imo completely fucked up. TBH, debian's binary packages could be easier, too, but have to be that "complex" mostly because of their politics.

TBH, I don't feel very confident in doing that (a conf, even if it's short), but on the other hand, those are topics I myself find interesting and that I think could/should be more documented.
Since I'm not confident, I'd be more than happy to not even try, so if no-one is interested, I'd be glad.