The following link has a list of the traditional anniversary gifts and some possible ideas to go with.
http://www.ivillage.co.uk/print/0,,533691,00.html
I honestly cannot remember if we exchanged gifts on our 2nd anniversary or not. We just celebrated our 11 th anniversary on New Years Eve and DH surprised me with a silver ipod (steel) it was very much a surprise.
IMO a nice set of cotton sheets would be nice. They have those great "Jersey Shirt" sheets that feel like a t-shirt and are available in so many different colors. Maybe buying a color you normally wouldn't consider so that when you see it on the bed it will remind you of your anniversary.?? Just a thought?? Anyway...good luck.