I'm not sure how this can be considered a "lightweight" app. Sure, it is Web based, but it requires Apache (comes with OS X) and at least PHP 4 and mySQL 4, each of which are about 30 megs compressed. I love the looks of it and what it looks to be able to do, but you have to load and configure two other apps (PHP and mySQL) and a Web server and get them working together before this can even be loaded. The developer does appear to offer decent support to those who have some systems background, but also doesn't appear to be aiming for anybody but a fairly highly experienced user base. I use other Java and even some X Windows Unix apps and have a fair amount of experience myself, but the demands and complexity of this app are daunting. I'm still thinking about it. Cost? A TRIFLE considering what it does.