PPC too...
One thing that I haven't seen mentioned is that it is highly likely that Apple will continue PPC builds (even if only internal builds) for the foreseeable future as insurance. Just as Apple kept Intel builds going for a long time, I believe they will do so with the PPC. That does not mean it will be released after 10.6, just that they will keep the code up-to-date for the major functions with a limited number of configurations. Consequently, they will be doing some of the work regardless.
My opinion on a few things:
1. Disk space is pretty irrelevant for the vast majority of users. Even if it is a 4GB build with large drives, doubling it to 8GB isn't that big a deal with big hard drives. To some people of course it is.
2. DVD space is somewhat relevant, but at worst they would add a 2nd DVD to include everything. It was done that way with the 400k disks, 800k disks, CDs etc. Obviously it is preferable to have everything on one disk, but not required.
3. I agree that it is unlikely they would sell different PPC/Intel versions, it is not user friendly.
4. I think that PPC support in 10.6 is important to engender customer loyalty. (I have 3 Intel and 3 remaining PPC makes, plus an old (working???not sure) 128k Mac). I have a dual G5 that is still on 10.4 because I have classic on it so don't intend to upgrade plus an older PPC iMac with 10.5, so personally I probably wouldn't be running 10.6 on any of the PPCs out there, but there are a lot of them and Apple would be smart to support them.
5. I don't believe it would take a lot of EXTRA work to do a PPC version, particularly if it is a performance and stability release as hinted. It is a re-compile and a re-test with some (albeit limited) specific coding. Most of the code is written in higher level languages. The kernel, drivers etc (e.g. lower level items) are the parts that require the most work and would most likely require some CPU specific code. My guess on the marginal extra work is maybe 10% based on my experience, it won't continue indefinitely, but one more release would be appropriate.
