I recall reading that starting with the official release of 2008.11, official updates will only be released with future official releases, e.g., 2009.4 or whatever. Now that the dev repository (http://pkg.opensolaris.org/dev/) has been introduced with the release of 2008.11, packages from successive releases of Nevada (e.g., snv_105) get placed in the dev repository.
I also was not able to get ?pkg image-update? to update using the packages in that depository. To do that, I had to use, as I recall, ?pkg install entire?: the dependencies specified in the entire package will force the updates to get installed. However, you have to be careful: ?pkg image-update?automatically creates a backup boot environment of your current BE, but ?pkg install? does not, so you have to do that by hand. The easiest way to do this is ?beadm create <new BE name>?. -- This message posted from opensolaris.org