What's the best answer for adding Image Transparency - Hover Effect to wordpress? I've got a couple of company logos that I wish to be diminishing before you hover them over....Can there be a simple solution? Searching for the best code and css...thanks a lot.

First define a category for your company logo design images such as this -

<img class="company-logo" src="..."/>

Adding CSS for company-logo design class such as this -

img.company-logo {
    opacity: 0.5; /* Set this to whatever value you want */
    filter: alpha(opacity=50);
}

img.company-logo:hover {
    opacity: 1; /* make the images fully opaque */
    filter: alpha(opacity=100);
}