The scene here mostly is dominated by Intel, Nike, etc. and a handful of satellite offices from other big companies (eBay, Amazon, New Relic, etc.) I think in 5-10 years it'll get there, though. Tech is increasing rapidly as a percentage of the Portland economy.
Portland Or and Northern New England (North of Boston, NH, Vermont, Southern Maine) might just be part of the Boston hub but if it's separate is seeing a ton of startup's.