I was only recently turned-on to Piclens and I love it.
PicLens is a free browser applet that views web-based images in a 3-d wall for browsing. you can then select images for close-up viewing. It needs to be seen to be understood.
I'm not sure if clients will be able to fully grasp how this is used, so I dunno if this is practical for web presentations accept maybe for more web savvy users...I know most of mine would not be. ;-)

There are web apps available to upload PicLens enabled galleries on your web site as well...and it's all free.
Has anybody used this?
any opinions?

Here is the site link
http://www.piclens.com/

I am am guessing this is a solid no. ;-)

Dave,
I have it installed and I love it. Its a great way to look through a big online gallery like on Flickr. I think there are some Lightroom gallery templates over at The Turning Gate that will allow you to make Lightroom galleries that support PicLens.

Wow, you can use piclens for your own galleries???! I am going to try it right now, I love piclens! Thanks for posting about it.

I though my post went un-noticed...thanks.

Yup, you can create your own galleries with Piclens...Good 'ol open source.
I wasn't even aware of the lightroom galleries capability...this rocks!