Grumpy_Mike:
If you can not hold your finger on it for longer then 5 seconds, then it is too hot. Otherwise it is fine.
that's where the idiom of 'rule of thumb' comes from, right? 
MarkT:
You diagram shows the LEDs in parallel, not series. The LEDs are not sinking current, they are the load.
An output pin sinks current if the current flows into it, and sources current if the current flows out of it.
68 ohms is rather a low value to drop 1.8V at 20mA (most blue/green/white LEDs are about 3.0 to 3.4V)
all of them were in parallel but connected in series with the pin, I expressed myself all wrong. it's nice to have some of the concepts sorted out the proper way, I guess, thank you
Wawa:
The BC337 and 2N2222 are electrically almost identical.
Not a problem if you use the same ones for the speaker and LEDs.
Watch the pinout though. Not all 2N2222 have the same pinout.
Not quite. The transistor is used as emitter follower, so base current depends on collector current.
Peak collector current could be 500mA for an 8ohm speaker, so I guess ~5mA base current.
But maybe wise to use the same value base resistor as used for the other transistor (270ohm).
Leo..
i have tested some higher values and did not notice any difference below 600r, anything above that I start to hear some decrease in volume
one thing i'm still confused about is how much the speaker wattage interferes in those calculations, I have about three or four 8ohm speakers, one is very large and has no other markings besides 8ohms, the other two, one has a 0.3w and the other 0.5w, i'm assuming both have different needs for a base resistor for the said transistor, am I wrong?