Need to allow alphabetic listings
 

I've seen other support threads where users managed to figure this out, but for the life of me, I cannot. I will write a custom script if I have to, but I'm hoping this is part of the reviewpost core.

Basically, I want to implement a header bar with links, like so:

# | A | B | C | D | E | F | G | H | ......

Clicking one of the links will show you a product listing of all products that START WITH that letter. So, if I had movies in my reviewpost installation, clicking on "B" might show me:

Babe
Batman
Beerfest

but would not show me

The Brave Little Toaster
or
The House of Blues

Is this possible with stock reviewpost, or do I need to implement something custom?

You would need to write something custom as a search would not work like your saying. Your just trying to match the first letter of a product and there is no such feature in any product we make.

You can sort your categories in alphabetical order but your talking about doing a search by a first letter of a product to return results so your title for the thread is a little deceptive.