ON the rain swept evening of August 8, rebel Gujarat BJP leader Shanker Singh Vaghela was clued to developments in the party through the pager of a Man Friday. When another message flashed: state BJP chief Vajubhai Vala had slapped a terse one-line showcause notice on him. "This should see me out by tomorrow," Vaghela said. Sure enough, he was expelled the next morning by the high command in Delhi.