litecoin Mt.Gox

I notice that when I transfer coins from MtGox to my computer wallet, wait for 6 confirmations, and send to somewhere else, I have to pay 0.0005 everytime, if I wait for a day before sending, I don't have to pay the fee or at least the fee will be reduced.

How many confirmations do I have to wait before the fee is waive ?

And when people use bitcoin services, they typically send coins to such services and such services send back some coins within short period of time, like sdice or bitcoingem, how do they avoid the fee ? is fee optional, just to quicken transaction ?

If it's optional why bitcoin-qt that I'm using does not make it optional.

I should be able to google them myself, but I'd like to take the opportunity as being a newbie to inquire the followings:

1. I do have free electricity, but the bw is quite limited, is it disadvantage in mining ?

2. If I can somehow get one of those ASIC thing, do I need a computer to plug it in or it will work out of the box like a rice cooker.

that's all for now. 

I tried the site few days ago. It did not work as expected.

I sent two bets on

lessthan 60000 - transaction id(1c1a5a4e12acf5198acbd1c7fc8fcdf18f6bfd3e68e1c57adcd089b43efe5d34) 0.001 BTC + (trx fee 0.0005 BTC)

lessthan 64000 - transaction id(d9468acbbc6112fdeb5b6f083e8698806ca3eb290e23ee0554517f1de0980cca) 0.00012 BTC + (trx fee 0.0005 BTC)

it took about 10 hours until I received 0.00012 BTC back - transaction id(2d56ed9390257d0960bed52bf9c582b97ea8e18b3cef3fdf825cc4086106cd25)

questions

1. After the coins are sent, why it took so long ? Is it because satoshidice has to wait for some N confirmations (It took 1 hour for my client to see 6 confirmations after sent), but 10 hours ?

2. I expected to see 2 transactions sent back. It's hard to believe that one of them turned out lose because of the odds.