The traditional gift for a 2nd anniversary should be something cotton - maybe clothes of some sort? The modern interpretation is china - perhaps a figurine of some sort, if she's into that sort of thing.
Or you could abandon the set lists and go for jewellery - that usually goes down well with us women Although the very best gift of all is spending the entire day together. Take the day off work if it's a weekday, sleep late, go somewhere you both enjoy (zoo, cinema, park) then have a long, leisurely meal in your favourite restaurant.
I got a portrait taken at this edgy studio in Dun Laoghaire called Venture. I think they also have a branch in Swords. It makes it ok for a 2nd anniversary because I think it'll be printed on a canvas. Venture's cool because they don't just do plain old portraits but fun, out-there stuff.