Point your iPhone to http://translate.google.com to check out the new, iPhone-optimized version of the translation service from Google. Pretty slick, eh? It's the full Google-translate, including all of the languages you'd find there.
Nice stuff, but there's one issue: Roaming charges while abroad are steeper than the west face of K2. Google's not fixing this by saving all of your translation searches right there on the page. Theoretically, you could punch in all your important phrases from your hotel's WiFi (or from the comforts of home) and then as you travel about just be sure, double sure, that you don't close that tab. Or visit any sites that might crash Safari.