I think Sega's still trying to find their footing, and they are quite simply going where the money is. We should be happy for this because they wouldn't be around if they didn't. I don't think Sega is necessarily putting more effort into Nintendo than MS or Sony, and that's evidenced by the freaking amazing games that the other consoles have gotten. GCN has gotten ports and upgrades, very often, while PS2 got Shinobi and VF4 (which I would kill for, but frankly wouldn't much enjoy on the GCN controller, I think I can safely say--however much I love the GCN controller) and XBOX got stuff like Panzer Dragoon and Shenmue II. I have ShenII on Dreamcast, and I treasure it (I know most people don't care for its game style, but I adore it) and not getting Orta on GCN really, really, really, really deeply hurts me. Badly. I have the three other Panzer games on Saturn, and believe me, we're missing a lot not playing Orta on GCN. Once I get some finances in order, the XBOX will be mine, even if only for that game. It's that great a series.
Anyway, I think Sega's doing an admirable job, and it's amazing how many games they've released from the inception of the Dreamcast to the present. Just think about it. It's amazing.
EDIT: BY THE WAY, Pat, let me take a moment to agree with you. Even if GCN isn't getting as many ORIGINAL games, I do believe that Sega and Nintendo are getting along very nicely. The future looks good. Triforce alone hints at this.