Not sure WHAT I was thinking:

For the DS, get a USB charger as you're going to have your notebook along anyway. Less to carry and worry about. I've seen cheapo combo iPod/DS/DSLite/PSP chargers for $5 out there. I got one from dealextreme.com, you can have them ship to Germany as well if you already know the address where you'll be. They take about 12 days.

For the Eneloops, another charger will work fine. I bought a 120/240v 4 hour charger and 4 2700mAh NiMH AAs at Fry's for $15. I have two Eneloops and haven't killed 'em in 6 months of middlin' usage. As long as Amazon.de is relatively inexpensive for something like that, wait 'till you get there. With the €/$ conversion rate though, you're likely better off getting it here.