It's not a cheap (or perfect) solution, but take a look at the Rimage Professional series or Producer series of products. (
http://rimage.com/products/professional-series/5400n.html)
I'm not sure if jobs can actually be submitted through a browser, but I know that a software client can be installed on LAN workstations that all publish to the single machine for encoding, burning and printing.
We have a few of the Producer 7100s here and I have a love/hate relationship with them, but they do some things really well. Warning: if it's made by Rimage, I hope you have deep pockets.