As for me, I can't really think of anything I want from my girlfriend really. So in that sense I give her a really hard time about this =P. Usually I try to think of things I need, and to be honest, I am pretty much satisfied in all that I have.
As I thought harder though, maybe there are some subtle things that I would like, such as a new chair for my desk. My current one is very uncomfortable and my arm rests especially are terrible. They are actually scraping my elbows and causing a few bumps now and then.
I find that finding the right chair is very difficult... it has to feel comfortable most importantly, and it also has to feel durable and must be adjustable. Everyone has different preferences in what kind of chair they feel is comfortable. I kind of like a chair with a high back, with adjustable height and PADDED arm rests.
Now I will love something like this from my girlfriend! (Or just having this kind of chair I guess)
I don't know what kind of things you all need, but maybe your own comfort when using your computer is overlooked! For all of you who still need to get something for your boyfriends... who knows, maybe ask him about it =P. They're not all that expensive if you find the right ones! Maybe you never have any issues thinking of idea of what to buy, but who knows, someday we all encounter this problem of not knowing that gifts to buy for a certain someone.
In any case, good luck with your gift ideas!