MacNN has received reports that a large lineup is forming outside the San Francisco Apple Store in the downtown district, swelling from an earlier estimate of 140 people (quoted by AppleInsider earlier today) now stretching over four city blocks in length. Sunny weather in the city has allowed customers wanting an iPad 2 to begin the traditional lineup later than their east coast counterparts, where it was still raining earlier in the day following a massive rainstorm Thursday night, with well over 500 people in line nonetheless. Other cities are also reporting long
