CPU doesn't matter with regards to mining, you need to have a good GPU.
Is my graphics card very good? (NVIDIA GeForce 320M)
No. It's actually pathetic. It should do about 6 MHash/s, I have a computer which can do 1400 MHash/s.
At your current rate: 1Mhash/s is a losing proposition you are going to pay a lot in electricity and not get anything out of it.
Does my Mhash/s depend on internet speed?
No.
In any case it's not enough to have a GPU, you need to actually use it. The Bitcoin client software doesn't, you need a mining software like kiv's GUI mining.
theoretically you could get lucky and get a block though, i mean its just down to the odds - you increase those odds with a better rig...
Regarding this, what do mining pools say about these odds?...I have a feeling that entering any sort of mining pool completely decreases the chance of luck in ratio to a single person because if one person gets lucky then the WHOLE POOL gets lucky but the amount of people in a pool is so large that it normalizes or something. idk what im saying actually....
Without a pool, you have 0.1% chance to get 50 BTC.
With a pool, you have 100% chance to get 0.05 BTC.
(Actual numbers depend on your hashrate and time spent mining)