I'm kinda feeling guilty myself as well, since my bro and his g/f are getting me something this year and I didn't. It was never a custom to give presents to bro since he's the elder of us 3. I only bought for sis and nobody else.
I did lend him $200 this year through rough time. I guess if I tell him I'd pardon the debt he owes me, that'll make it even hey? Or I can get a Tony Romas gift certificate tomorrow.