I'll just say it now; I'm not really looking forward to WiiWare. There are only two or so titles for it that interest me, and what's more, this service has taken games that could've been great DS titles (Toki Tori, Shantae for instance). However, I have noted a few points that make WiiWare a worthy 'platform' to develop games for:

1: Freedom - What I mean by this is that many developers can work on WiiWare and not just big-name companies. The small guys have an equal share of good ideas, and the system is perfect for them.
2 - Cost-effective - No packaging, shipping, publishing or anything of the matter. Although I'm sure Nintendo gets a share of the profits, it probably doesn't compare to the cost of buying game boxes, printing manuals, and shipping titles.
3 - Piracy - Ah, game piracy, my sworn enemy. WiiWare titles won't be pirated anytime soon, if at all. This is my favorite aspect of the service, seeing how DS / GBA piracy has expanded greatly over the last few years.

There you have it. I hope more WiiWare titles are announced soon; I'm bound to like some of them!