Apple seems unable to make up its mind over NetShare, the iPhone tethering application which first appeared, disappeared, reappeared, and has now vanished again from their App Store.In what could only be termed as bizarre, Nullriver’s NetShare application has been removed once from the iPhone App Store, only to reappear and then disappear again. Apple has not released a statement as to why it’s been pulled, but one can only speculate that it in some way violates the SDK or perhaps Apple has put the app back