I'd just add that we too are running into this for Socialite.app. The omission of lists that the user is following the in /user/lists/ subscriptions.format method means we can't offer a similar experience in-app to that found on Twitter.com
If someone's already filed a request on this with Twitter (I couldn't see one), could they let us know here: otherwise I'll file it myself :) Cheers! -N -- Nik Fletcher Realmac Software
