It looks like Engadget has gotten a tip that San Francisco's BART is currently running a WiFi trial. If it works, it could be a model for other public transportation systems across the country, meaning you could be surfing the internet on free WiFi during your morning commute. As someone who uses trains and buses often with an iPhone, I'm really excited about this possibility (although it still stings that we don't have free citywide WiFi yet!). What about you guys? Would all you subway and public trans riders use this?