To accompany the move to the new API, there's also a new Potlatch (version 0.4). Of course, Potlatch has always been based around segment-free editing, so this has been a fairly happy transition. But there are plenty of changes, and here are the main ones:

• Works with the new database!
  
• You can now merge two adjacent ways (i.e. ones which share an end-point) by clicking one, then shift-clicking the other.
  
• You can reverse the order of a way by clicking the arrow icon.
  
• When drawing a way (i.e. elastic band), pressing Delete will act as "backspace" - i.e. remove the point you added last.
  
• The age-old problem of : in keys has been kludged, for now. They appear as | (bar), and you can edit them as long as you too type | instead of :.
  
• Lots and lots of bugfixes, efficiency improvements, etc.
  

Potlatch doesn't yet let you create relations. However, it's fairly well behaved in that, if you delete a way or node, Potlatch will remove it from any relations of which it's a member. As usual, if (when) you find bugs, either e-mail details to me, or use trac, or edit Potlatch/Bugs on the wiki.