The same link, above with rootzwiki, someone apparently from a Chinese BBS had posted the official .629 sbf. Though apparently the .608 and then .629 method works too, but it has wifi issues that require an extra step.
http://rootzwiki.com/topic/23207-how-to-sbf-unbricking-root-d2g-629/
http://db.tt/mzD2taLb <---- the "official" .629 sbf that's listed in the first post in the link above.
http://rootzwiki.com/topic/23207-how-to-sbf-unbricking-root-d2g-629/
http://db.tt/mzD2taLb <---- the "official" .629 sbf that's listed in the first post in the link above.