That explains why MtGox was taking so long to get funds back today, close to 12 hours.
Example:
I initiated a Dwolla withdrawal from MtGox on:
Sunday July 10, 2011 @ 05:32:08
It arrived at Dwolla on:
Sunday July 10, 2011 @ 23:40:46
A difference of a little over 18 hours. -- Once you're about early to mid-afternoon Friday, UTC, you're pretty much in the 12-24 hour period for transfers during the weekends.
Cheers,
Kermee