An important update to this version has been published. See Imtech Fields Explorer v126.96.36.199 for more details.
Recently I've been working quite intensively with the SharePoint developer bookmarklets. SharePoint is really infamous of way too many clicks required to accomplish various things. Having shortcuts to the most commonly used functionality within one click saves really a lot of time.
I'm a big fan of using the Explorer View: it provides you much more overview of the file system and allows you to access other directories with a single click even if they are located in a different branch on the file system.
How many times did you actually have to rename the .wsp file to .cab in order to browse its contents? SharePoint 2007 allows you to use any extension for the solution files, so you could build all your solutions with the .cab extension to support quick browsing. This has however two downsides.
Recently I have noticed that quite often I need to navigate to the 12 folder using the Open/Save file dialog. While I have already created a shortcut to 12 directory on the taskbar, which is sufficient in many cases and provides me quick access to all SharePoint system files, I was still left with the Open/Save file dialog. To get the quick access to the SharePoint system files in the Open/Save file dialog, I have decided to customize the Places bar and replace one of the locations with the 12 directory.