Worried about Photo Stream leaks?
There’s been a number of articles about the possibility of Apple’s new iOS 5 Photo Stream service spreading the “wrong” photos around, and the option to avoid this is generally “reset the Photo Stream“.
An alternate I proved today – set your i device to airplane mode (or otherwise disable uploading); now go through and delete the photos you don’t want to have shared; a dialog will warn about deleting in two places, and you’re OK with that. Now when you connect to WiFi only the remaining pictures will upload.
This worked great on my iPad today, pre-sorting photos imported from camera before uploading only what I wanted to keep.
If you do want to save the deleted photos, you could probably use something like Photogene to make copies elsewhere than in the main photo album, so that they are not uploaded (I haven’t tried this).