"So I wonder if they're like the remnents of the Dharma project, and they're stranded b/c everyone else forgot about them? "
I'm not so sure that they have been 'forgotten'. Wasn't there a 'food drop' in season 2 - where the survivors came upon a large parachute with a wooden crate attached - with provisions inside?
That would make it seem that there were still regularly scheduled shipments of goods to the island - to support the people still on the island... from somewhere.
I love the show... it takes intense concentration though... and one must also watch the 'background' as there are things and people there that need to be observed - as they may have a bearing on the crash survivors.
They seem to play on the '6 degrees of seperation' - where everyone's past history is linked to the other... through some common thread.
Regards,
Jim TX