I'm headed up Si tomorrow after work (4/4). I'm dropping a bug that has to stay up there until the owner retrieves it but a very cool coin.... to the first that grabs it! Fantastic hike - be sure to bring lots of water with you.
Oh, and Team Jac'd - we won't bring our kids up Si yet (ages 10, 7 and 5). Not until they get bigger. They are great hikers but its a pretty intense hike. They are comfortable with West Tiger but this is a whole other ballgame.