The engines have become more long url friendly. The problem with dynamic sites is the programmers usually don't have a clue about SEO. They pick the dynamic title, descriptic and and keywords.
I like to use a cart that allows me to type in my own for each individual product.
There is a cheap cart with a cheap seo mod that I use for smaller companies that works great for seo "candypress". The seo mod was $20.00 the last time I bought it.
Like with any seo the more specific you are the better chance on conversion and better chance of placing higher.
Here's an example of CandyPress (shipping charges on raw product put this lady out of business - but the site was a freebie)
Motorcycle Rider Ducky -
http://www.google.com/search?hl=en&q...y+&btnG=Search
Biker ducky soap -
http://www.google.com/search?hl=en&q...ap&btnG=Search
Military Soap -
http://www.google.com/search?hl=en&q...ap&btnG=Search
name your products carefully and put in the seo and the seo mod will work for you. Notice that I also used static pages and linked into the cart (just because.....lol)
every product made it into the top 10 in Google.
Nothing special done - nothing to brag about - just the seo mod up against companies with no seo mod.
Candypress is a good little cart when you pop the seo mod in