I just hit over a $100 for the first time, when you request a payment does it have to be for $100 or could it be for example $120?

You can specify any amount as long as it's over $100. My experience is that it takes two or three working days for them to get the funds into your PayPal account.

only paypal? do they pay to moneybookers?

They also pay with moneybookers