Welcome to the Quilting Board!

I got a great pattern for a table at Keepsake Quilting. You don't really need the instructions if you already have a table, but it helps with figuring out the drop mechanism etc. I could never go back to sewing on a flat table!
That computer table idea sounds very clever.
Since I couldn't think of that, I ended up with a butcherblock island top - 1 1/2" thick walnut. It's gorgeous but does require a serious saw to cut out the sewing machine hole. And I will say that it doesn't rock or sway like my Ikea table does. You might want to consider that factor when you choose the table.
hugs,
Charlotte