*edit* Details for ordering the original style DS Browser *edit*
I *just* got this e-mail from NoA and *just* got off the phone from ordering mine.
For those who are interested, this version of the DS Browser will work in both the original style ("Phat") DS and the newer DS Lite, although the RAM cart will stick out of the bottom of the DS Lite (just like a GBA cart).
This item is $29.99 + $5 shipping (flat rate, so if you order more items, it'll cover it) + tax where applicable. It came out to $37.17 for me.
Additionally, if you just want to order the original style DS RAM expansion pak (say you have a DS Lite and an original DS and you want the RAM pak for both but will only use the browser in one at a time or something...) you can order it for $15. (+tax/shipping).
From looking at the resale value of some of the other Nintendo.com exclusives (Electroplankton, Pokémon Box, GCN Componet Cables and to a smaller extent, DDR Mario Mix), this could be something worth picking up at this price.
Call 1.800.255.3700 to order. Choose Option 4, then option 0. Tell them you need to order the Original Style DS Web Browser and that UncleBob sent ya!

The Nintendo DS Browser comes out in the US this week. Quite some time after the JP/EU releases.
The DS Browser comes in two flavors.

For those who only have/use a DS Lite, there's the DS Lite Web Browser. It *only* works in the DS Lite as the memory expansion that's included will only fit into the DSLite's GBA slot. Should be in stores early this week for a retail of about $30.

And for those who still use their original DS, you're out of luck. Not really - the original style of the DS Web Browser comes with a normal GBA sized memory expansion that will allow you to use it in yor original DS and your DS Lite. Unfortunatly, this version will only be sold directly through Nintendo on their webstore (store.nintendo.com). It's not up there yet, but should be by Wednesday according to the rep I spoke with.
Anyone seen the Lite version in stores yet?