- For the sim cards. Any monthly prepaid plan like the $50 T-mobile 4G with unlimited data, text &talk is fine.
- For internet try check verizon, att, t-mobile or timewarner. I currently have time warner. It's a bit expensive. FIOS with 20mb/s for $45 a month.
- For the event checkout http://www.eventbrite.com & http://www.meetup.com and search for the events.
- Fro the transportation, get a cliper card. You can take the bart and the bus with it. Unfortunately a car is a must have for the bay area if you are planning to driving around palo alto, ...
And, it's a good idea, we should setup an hacker news meetup !