check this out:
http://www.mkiv.com/tmp/emanage/index.html
a) similar things to a unichip
c) dunno
d) it kills an SAFC is properly tuned but this depends on C....
e) $420? (nengun price) -this price is slightly cheap but you may need to get the extra stuff. My friend bought one... shipped, with software, all additional sensors he paid $1000. This was from perfectrun.
In the end he sold it and bought a Power FC if thats anything to go by