Just a little tip, as the syntax of less (less css) is so similar to css, just add a new file type in Netbeans > Tools > Options > Miscellaneous > Files like so: !(/wordpress/wp-content/uploads/2009/11/netbeans-less.png) Update: I found less editing works a lot better with Netbeans 6.5.1 than with 6.8. The code formatting of 6.8 is too picky and will essentially not format less as it's not proper css. No such problems with Netbeans 6.5.1 which I also use on Windows as a vastly superior less and css editor compared with Visual Studio. You can always get Netbeans 6.5.1 and other versions through this page: http://www.netbeans.info/downloads/dev.php
Damien: Nice but the CSS colorator fail on some LESS syntax (display errors and dont understand variables, nested rules...)
dirk: @Damien: Thanks for your comment! You're right, it's definitely not perfect and will display plenty of errors on the side bar. But better than nothing I guess. It shouldn't be too hard to make it right but I have zero experience hacking NB.
Kars: Thanks, this is just what I was looking for when I was trying to work with less on netbeans for the first time. I'm currently using 6.9.1. If it is still too picky I think I'll try the older version you specified.
dirk: @Karsten: Thanks, very helpful this new plugin. As outlined in the post update I stayed with Netbeans 6.5.1 because it was unobtrusive with lesscsss and even did nice reformatting. A specialized plugin should be even better.
v.light: Do not understand how do I download and install this plug-in for NB 6.8 Didn't see any *.nbm files on BitBucket distro..... P.S. I'm on Windows.
c33s: working lesscss module (tested with netbeans 7.0) http://services.netbeans.org/pluginportal-2.0/plugin/32782/lesscss-module