I have fallen for this slick plugin, but wound up butchering it pretty heavily for my not-so-average needs. It was easier than writing it from scratch. Simbul, if you are interested in any of the changes I have made, I'll be happy to share them. :)
- Refactored the widget code so you can actually run any number of copies of the widget. I haven't cleaned it up quite enough so that you can add multiple copies without editing the script, but at least now it is scalable.
- Changed the MCE so you can get the caption border around images you embed into wordpress, and uses the caption shortcode to align the image, giving an extra alignment option.
- Changed the widget code to allow you to select any arbitrary list of albums from the gallery to use in the widget. A bit more flexible for galleries like mine where I split up the albums between the two widgets I use, and have an album or two that I don't want in the widgets at all. Currently only acts like an 'include this list' operation, rather than an 'exclude this list' operation which I could see as being useful.
Still, very useful plugin, and I wouldn't have been able to layout my blog the way I wanted without it.