So, for the roller, there are two ways to do it - the DICE tag and the ROLL tag. The basic format for inserting a die roll is:
[dice]XXXXXX[/dice] or [roll]XXXX[/roll]. The 'XXXXX' part is replaced by the characters indicating what dice you want to roll. DICE will output a small box showing you the roll results, whereas ROLL just produces a little picture of a die - you hover your mouse over it to see the results.
For Exalted, you want to use the following: Xd10s7a - where 'X' is the number of dice you are rolling, 'd10' is obviously the die type, 's7' tells to count any roll of 7 or better as a success, and 'a' tells it to add a success on a roll of 10. So a command to roll a 10-die pool would be either [dice]10d10s7a[/dice] or [roll]10d10s7a[/roll]. Here's what they look like when you actually do them:
d10 Results: 9, 2, 2, 6, 4, 6, 8, 7, 4, 10 (Total Successes = 5)
d10 Results: 4, 5, 2, 4, 7, 1, 6, 2, 10, 8 (Total Successes = 4)
I presonally preferr ROLL to DICE - it's a little less obtuse, especially if you're doing several rolls. To make it a little more useful, I found that adding the 'z' command to the end of the die string on ROLL helps - z tells it to display the number of successes after the roll, so you only need to mouse over the die to see the individual rolls. So instead of 'Xd10s7a', you'd do 'Xd10s7az'. It ends up looking like this:
'ROLL' command with 'z':
d10 Results: 9, 6, 1, 7, 8, 1, 9, 1, 9, 6 (Total Successes = 5)
THere are other options too, like labeling your rolls - you can go to the Help menu and pick Dice Roller to learn more.