After much anticipation, Patch 1.13c was released for Diablo II on March 23, 2010, along with a reset of the ladder. Among the most noticeable changes are a new way to respec skills and stats.
Arreat Summit: The 1.13 patch for Diablo II is now live! With this patch we have included a number of changes including a new respec system, allowing you to reset your character's stats and skills. With the release of 1.13 the Diablo II ladder has been reset and all previous ladder characters are now normal non-ladder characters. To participate in the new ladder you'll need to create a new character and ensure the "Ladder Character" option is checked.
The changes in the new patch can be read here.
The patch can be downloaded here: [1]