I haven't tried (or heard of Apache Lenya).
If it's free though, it couldn't hurt trying it out to see if it's a better fit for you than nvu.
From what I just read real quick, apache lenya seems to be a java based program for editing pages via the web (browser), whereas nvu is a software that you can download and edit pages offline on your computer and upload to the web (more like dreamweaver).
apache lenya seems more like a content management system like drupal/mambo/etc whereas nvu is just web design software.
If it's free though, it couldn't hurt trying it out to see if it's a better fit for you than nvu.
From what I just read real quick, apache lenya seems to be a java based program for editing pages via the web (browser), whereas nvu is a software that you can download and edit pages offline on your computer and upload to the web (more like dreamweaver).
apache lenya seems more like a content management system like drupal/mambo/etc whereas nvu is just web design software.