Some other opitons are Caleo that is due in January at $150 with wifi and promise of an API
https://casaconnect.com
The Walker Systems at $200 with Zigbee Pro http://www.walkersys.com/homeproducts.html
SmartThings Zigbee Line Voltage Thermostat for baseboards
http://www.walkersys.com/images/products/lvstatlarge.jpg
From the Left field and cheapest by far with PID control at the heater certified to maintain the temperature fluctuations to less than 1.5C at the room center with a smaller (but much hotter) modern design - the Dimplex Connex with an unreleased-but-mooted-in-2012 Connex to Wifi bridge. It’s about $110 at more electric per baseboard heater, and the timer is $50. The little remote is $25 but not compatible with the programmer. http://blog.dimplex.com/energy/re-inventing-the-electric-baseboard/
And the nuheat wifi which has no API (although they did mention once back on Facebook then dumped the thread) and is $250 per room with no triac control for convectors.