Guild Wars: Guild Wars Testing Weekend #2

This was announced at the official site:

This weekend, starting around Noon PST on Friday, you'll have another opportunity to test updates for Guild Wars. We're rolling in a significant number of skill changes along with updates to Heroes' Ascent, as well. We'll be leaving the changes in place this time, but will assess player feedback to help formulate future balance changes and updates, so we hope you'll try out these changes and provide your feedback on the fan forums.