Take it man, everything you describe sounds like you should except the part about knowing everyone at the job place, being hesistant due to that (depends on how much you value that, if the job is not improvement enough career wise, I would stay where I enjoy being). But all of what you said leads to you should take it.
In a similar sitaution, like my co-workers/inviroment (quite fun
), close to home/friends, but job wise its pretty identical to what you describe, being given more responsbility without getting paid for it, no prospects (or there is, but one that would bore me to tears). Only job offers I got is from the same company, promotion, but it involves moving overseas, no thanks.