Sir Richard Branson's SFO-based harem of nubile air carriages wants you on board. Beginning this morning, cut-rate tickets are on sale for LAX-SFO flights on Virgin America. 5 flights daily are scheduled to shuttle between the two airports starting August 8 -- with coach seats going for $44 each way (before tax). First-class Virgin tickets are also offered at the introductory price of $149 each way. While numerous airlines have been grounded, bought out, or......