[bromix]

Would be useful for skinners. Any plans to add it?

No, Addon = Content-Provider. What is your intention, especially if skinners need it, wouldn't other addons need this kind of support also?

I use some lists for widgets and if I'm not logged in I'll get content provider "un
known kind" errors. I just want to disable that widget contents for that case.

I must ask again, how often trigger these widgets the addon? I'm really concerned about the quota it his case. If it's not this skin, maybe some other skin, requesting over and over again data, which is only displayed but not used. We have nothing from that but only a nice looking gui and a maybe disabled addon.
Also which call do you use for which you need the login?