I posted a DWG/DXF reader on the wishlist at maemo a long time ago, still think it would be a great thing to have on the 770.

As for the cover it would be great if you could come up with something functional, the cover that comes with it is actually the only thing that really bugs me we the 770, I use it a lot less because it takes so much time to get the cover off!!

So, I think it is really critical that it is really easy to acces the device when you take it up from the bag. Maximum a second or two, and it should only require ONE HAND! That's a biggie, for me at least. And I like magnets for closure. I think keeping it as small, light and easy as possible is most important. For that I would sacrafice the clip, the name-window and the name cards. I would think one or two pockets for MMC and one for the stylus would be worth it though.

In terms of style, keep it simple and pure, and make sure it's black leather, not brown. Or sillicone, that would be neat.

Edit:
To clarify, with one hand I mean one hand for the opening procedure. The other hand can still hold it. But right now I have to use both hands to get the cover off, (one holds the cover, one pushes through the hole in the bottom) and hold it at the same time. Very cumbersome. Ok, if anywone follows me I would be surprised. Sorry 'bout that.

But it bugs me.