DConf Online '24: Still have room for talks

[Mike Parker]

If you waffled over whether or not to submit a talk for DConf 
Online '24, we still have space for some. If we don't get 
anymore, then it's going to be a one-day event. I'd very much 
like to make it two.

I'll waive the requirement for a video submission. Just let me 
know the talk title and an abstract, with a bit of a description 
of how it will go. Remember, we want to keep them around 20-30 
minutes.