It's a good upgrade, and looks a lot slicker, but there are still a few points to address for fine tuning.
Bear in mind that I do websites, so these points are minor and forgive me for being picky!
Front/Intro page - great
About Page- v good, except that I would make the following text into a hyperlink to the relevant pages, but without underlining on mouse over (your tech guy will understand):
"These talents are now available in several artistic formats including cards and wall art
change to:
"These talents are now available in several artistic formats, including greeting cards and high quality wall art ."
-link those to the 'ordering cards' and 'ordering prints' pages.
"For something more personal, portraiture and individualized shoots are a specialty . Angela is available for commercial and advertising assignments ."
-link the first to 'portrait session' page and include some blurb in there about commercial availability for the second, or better yet create a separate commercial page and link to it.
By repeating the relevant text on various pages 'greetings cards', 'portraits', 'high quality wall art' etc, and then including those phrases in your meta keywords for the relevant page, you are effectively SEO'ing your site.
You also need a page title on each page with H1 tags, but it doesn't need to be large, bold or underlined (you can change that in CSS), it just needs the H1 brackets. H1 tags are another SEO trigger, and are best used when they echo either the keywords or page description in your metatags.
For example on the about page, have a title of 'about us' in lower case but with a slightly lighter colour as an H1. The same goes for each separate page including each gallery.
With the galleries you need to group the photos a bit better and change the thumbnail view:
I'd stick to 2 to 3 lines of thumbnails on each page, and then have a page 2 if necessary, preferably not as an extra menu item if your gallery software allows it (there should be a facility to limit the number of thumbnails shown per page). In preference have about 12-18 per page in two or three rows of thumbs and make them slightly larger.
Group your thumbnails by type, rather than have them inserted slightly randomly; ie all the b/w together, all the colour together.
Likewise, with the cards, group your subjects by type; all the frogs, all the pencils, all the cars in the same gallery next to each other. It makes it slightly less confusing for the eye. Another approach (as you are selling the images) would be to group them by dominant colour, but overall the idea is that patterns make people comfortable, whereas randomness confuses them and can make them leave quicker than you would like!
In some cases you have a few repeated images with different themes; for example the Lighthouse in b/w and colour, and the cars. Unless you are offering choices for sale (which obviously you are in the case of the cars) I'd decide on one version and go with that.
That leads on to future development and where to aim for!!!!!!
Trying to create a site that shows a portfolio for commercial/portrait work but also drives image sales is a tough thing to do, as they both have different objectives. The former should show a limited number of high impact/quality images showcasing your talent and style. The latter needs to offer a broad choice of purchase items to cater for varying tastes.
Once you have got this project tucked away and you are happy with it, I would investigate the idea of having two separate sites. You don't necessarily have to have two different URLs (although doing this and linking them would help with search engines), as you can do it on the one domain creating two seperate subdomains beneath it. Basically you have an intro page which links to the two sites, which would be something like:
portfolio.twopossumsphotography. com.au
to advertise your commercial and portfolio work,
and
art.twopossumsphotography.com.au
for your sales
-my domain wording isn't great as I'm just jotting this down, but hopefully you get the idea and can brainstorm the names. It would make for a neater solution that having everything under one roof.
One final idea, from an arty/sales point of view...
Have you thought of creating an art/montage page for the cards? You have some great images that would work well together.
This is most obvious one, as it is almost there in the gallery already with the way the thumbnails are set out(I hope that you don't mind me borrowing the relevant thumbnails!):
bump the cost of the montages up by 50c to $1.50 and make them a feature- 4 images for the price of two etc!!
You could even let people pick their own combination of 4 images!