Is there something special you should put on it if you plan to be setting cold drinks (with condensation), etc. on the table?
Well, my boyfriend and I have been debating on how to handle that... We could have used a special grout which has a "stain fighter" built in (I saw that type at Lowe's) - but it was expensive, so I passed since this was my first attempt at mosaic.
Another option would be to seal the grout now that it has dried - you can pick that stuff up at a Lowe's or Home Depot type of place.
Since my table is a little on the "lumpy" side (all those plates and bowls were varying widths!), we're thinking of placing a thick piece of glass on top of the table to give an even surface for drinks (on coasters to be safe!). That would eliminate the worry about stains as well....