According to GameStop, a date might be set for the English version of Xenosaga: Episode I. While unconfirmed by Namco as yet, the game is listed in GameStop computers (as in, in-store computers; no information is available on their website) with a March 2003 date.
While retailer release dates can sometimes be mere placeholders, often times they turn out to be accurate. (Tales of Eternia anyone?) While over a year after the Japanese release seems like a long time, Xenosaga: Episode I does contain a great deal of voice acting. It's not on a dual-layered DVD for nothing.
Namco will likely have the game on display at this year's E3 expo, possibly with a more concrete release date. Stay tuned.
Thanks to Citan Uzuki for the tip.