I have roughly 5G of photos in Gmail that I wish to upload to Picasa Web Albums without prior downloading. I have already checked the GData API and could not find anything that would allow me to do it, that means I would have to download 5GB first on my computer and then upload it to Picasa Web. It's a terrible waste of bandwidth.
As this is dictated only by a private need I am not desperate to write my own app, although I doubt such an application exists as I have spent a considerable amount of time on looking for it.