I finally found a basic position in Boston. I live in the MetroWest area, and I applied to all of the companies that I could think of within 45 minutes or so. Note that I go to school in Colorado so I was only able to give them summer/winter breaks. Here's what I can tell you:
Action Wilmington
Not currently hiring basics (got a "thanks for applying" postcard).
Alert--Boston (Hyde Park) and Fall River
Might be hiring basics, heard that second hand. I couldn't get a hold of anyone via phone, email, or mail. MA/RI certified a definite plus.
AMR--Natick, locations everywhere
Last pre-hire test was in May, I was told that another would happen in June, call the Natick office/MA corporate office for hiring info.
Armstrong--Arlington
Not hiring basics for the summer, but may have openings for year-round positions.
Brewster--Boston (Roslindale)
Just finished a hiring cycle and switching over to orientation for new employees. Consider applying, this company is definitely looking to grow. They are opening a new location in Middleborough in support of their new 911 contract and push into that region.
Cataldo/Atlantic--Boston and North Shore
Not hiring basics with less than 5 years experience at this time.
Eascare--Boston
Never spoke with anyone in person, apply online.
Fallon--Quincy
Could be hiring basics, apply online and then call HR and ask to speak to someone about your app after you submit it. Otherwise you'll never hear anything.
Lifeline--Woburn
At one point they were conducting interviews for basics, but their upper level management is currently embroiled in an OEMS investigation and they are moving their corporate offices so getting in touch with HR can be tough.
Caritas/Norwood Hospital EMS
Not hiring basics, but are looking for medics.
Events--Millis
Not currently hiring basics.
American--Boston (formerly known as General, Mercy, and Samaritan)
Were "evaluating their need for basics" two weeks ago, I have no idea what they need now.
South Shore Hospital EMS--Weymouth
Position could be opening the near future, check the hospital's employment website.
Eastern--Woburn
Basic position could be opening soon, call their office on a Monday, Wednesday, and Friday to talk to the guy that does the hiring.