It looks like the upcoming release of Lightroom, which is supposed to bring compatibility with Leopard, may bring more. Todd Dominey wrote the following on the SlideShowPro News blog:
A frequent request from many, I’m pleased to announce that in the coming weeks we’ll be offering a plugin for Adobe Lightroom, the Windows / OS X photo management and editing software developed for professional photographers.
SlideShowPro looks interesting, and being able to have more output options from Lightroom is a good thing. But, hello! This might (emphasis on might, I know nothing, I’m not under NDA, etc) mean that the long awaited SDK is about to be ready to go. If so, that’s great news and will be a welcome feature in the next version of Lightroom.
Anyway, let's see what SSP and next Lr update will bring us. As many users, I wish for a not-too-distant release of a SDK, in order to get addidtionnal tools produced by specialized software editors.
Regarding what I said below, I'm only reporting what I heard in a conversation by accident - so it has to be taken with a grain of salt, of course.
Alexander is correct. Though I don't know exactly what Todd is planning, you should certainly not infer that his SSP "plugin" (he used the wrong term) means that an SDK must be imminent. I am more than 99% certain he will create a web gallery - as an SSP user, I had investigated doing so myself. All you need is XML/XSLT. And time.
Gilles, anyone who told you about some SDK was either under an NDA, or wasn't and didn't know what they were talking about.
I don't think that SlideShowPro is only a web gallery. And it can be that this company has access to Lightroom beta program and already work on a draft plug-in.
And yes, SDK is part of Lr 1.3 beta, but it doesn't mean that it will necessarily ship with the retail version.
In the absence of related news from elsewhere, I would guess that this is simply a Web Gallery and not a plug-in in the sense that it was based on some official SDK. Web Galleries have been created by others before and are not really a secret... Just some knowledge of XML/XSLT.
I was told as well that SDK may be part of Lightroom 1.3. Hope this is really the case, as integrated plug-ins and tools will bring Adobe's software to stratospheric levels.
As Camera Raw 4.3 is in the pipeline as well, I have no idea if mid-november update will be a simple fix for Leopard or a full new version.