Q. What cyber grades are listed, and do they operate the same way as they did in SR3?

Alpha, -20% ess., cost*2
Beta, -30% ess., cost*4
Delta, -50% ess., cost*10

Q. Examples of stats for a standard piece cyberware? (say, the much beloved Wired Reflexes 2)

Wired 2, essence 3, capacity - n/a, availability 16R (not available under standard chargen rules of availability 12), 32,000 nuyen. System includes a trigger to turn on and off. +1 to Reaction and +1 Initiative pass per rating point. So +2 Reaction, +2 Initiative passes (roughly +20 initiative?) Wired 2 still costs comparably much essence (3), but its nuyen cost has been *divided by ten*


Q. What about skillwires?

Active skillsofts are rating 1-4, knowsofts and linguasofts are 1-5.
skillsofts - rating *3ooo nuyen
knowsofts - rating*1000
Linguasofts - rating*500
Skillwires are available in ratings from 1-5, rating*.2 essence, rating*4 avalability, rating*2000 nuyen. need rating of at least active softs rating. Skillwires can handle a number of skillsofts with a total rating up to 2*its own rating.

Q.Any word on Tactical Computers (ie, do they exist)?

Don't see it.