The current limit of 25 WUs at the same time seems to work quite well. Next week I will be on holiday, and we will see how well it will work during this period of time.
I won't have internet during that week, but if there are problems <a href='http://freehal.net/tobias-schulz/'>feel free to contact me (mobile phone)</a>, then
I will try to get online.<br/>If the limit works well, I plan to increase it to 35 and so on.