Hello,
I can certainly complete this plugin for you. Is this for one site, or is it something that you plan to resell? If it's for one site, could you provide a link please?
Also, do you have any links to slide out panels that you like? Just so I know what you're after, I've seen a lot of different looks for this.
I would use jQuery to do the panel slide, as opposed to CSS which might not work on all browsers.
I specialize in WordPress, PHP and jQuery, so this would be a comfortable project for me. Here is some of my past work:
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Cheers,
John