Thanks for the comments. I was looking thru Pelican's site and while it doesn't say anything specifically about whether the foam they use is anti-static or not, from the "look" of it, it very well could be. Also considering some of the equipment that they make cases for...memory cards and electronics amoungst other things...I'd guess they do use the anti-static stuff.
Basically the foam I'm looking to use is your basic furnature foam...I actually have a rather sizeable supply from a couple of old couches. I use it down in my music studio to control the sound because it's really dense and absorbs sound vibrations really well (and it does a great job, especially with bass frequencies). The stuff is like 5" thick, so a good chunk of it with holes cut for my lenses would work ideal in my camera case. Again being a PC tech though and knowing the damage the static can cause, I thought it would be prudent to get a second opinion or two before I went ahead and did it.
Pat...while I haven't read the thing on the Canon USM IS lenses that you mentioned, it kind of doesn't surprise me either. I do keep reading all this stuff about dust and dust removal and was kind of wondering about it. I've had my Canon Rebel for going on a year now and haven't really had any problem at all with dust...the lenses, yes, but the camera/sensor, no. My house is real dusty and I'm not exactly vigolent about keeping my camera in a case when I'm not using it, but I've never had any problems (yet) so that little voice in the back of my head kept wondering what the big deal about dust was all about (LOL!). On the other hand, I don't have any of the afore mentioned lenses though either. Also since I use mostly Tamron and Sigma lenses, I have to turn the camera off during lens changes anyways because the camera tends to error out if I don't, so that could be a contributing factor as well. With the e-tronics on some of those newer high end lenses though, it wouldn't surprise me a bit if they do in fact have a tendancy to attract dust or have their own issues with static.
Anyways again thanks for the comments and input. I'll probably sit down in the next evening or so and cut some foam for the camera bag and we'll see how it works out. If nothing else, my wife suggested tossing a dryer sheet in the bottom of the bag since those are anti-static anyways...that way all my lenses will smell "snuggly fresh" to boot! LOL!!!