Boston Globe: In last week’s Globe, reporter Kimberly Blanton and I wrote about the potential for gas prices to spur more Americans to abandon long suburban commutes, by choosing homes closer to Boston and other big cities or seeking towns with access to public transit. The magnitude of these changes is debatable, and will depend a lot on how high gas prices get and how long they stay that way. But as painfully high as gas prices are, and as frustrating as it can be to let them dictate how …