After my post about what I considered to be a lack-luster start to the Denver Developer User Group (apparently things got better at the end of the meeting), Jeremiah Lindemann of ESRI Denver (who led the presentation) emailed me to assure me that the developer summit will be aimed at the professional developer.
You also noted concern about the Developer Summit. I would like to make it very clear that this summit will be extremely developer orientated. The presentations will go into much depth with the topics you are looking for. There may be one or two presentations on creating a custom component, but the majority of conference will dig far deeper into true GIS Development (Engine/Server/Web Services/etc). An official agenda should be posted by ESRI soon.
I’d like to thank Jeremiah for responding, and to say that I think that the idea of a developer group is great, I’d like to actively participate. I commend ESRI Denver for taking the initiative in this area (first regional office to start a developer user group); I know that starting up something like this is not easy, and there are bound to be hiccups along the way. Hopefully we can work together to create a strong & vibrant ESRI developer community along the Front Range.