Rob Moseley has the complete Oregon press release right here.
It's always huge when a team adds a new offensive coordinator (and in Helfrich's case, he's also QBs coach). But this announcement came with a second twist, the promotion of offensive line coach Steve Greatwood to running game coordinator.
Nice move, Chip Kelly! Greatwood has been acknowledged as one of the best line coaches in the country and was a serious candidate for a head coaching job (Cal Poly, I believe) following Oregon's successful 2008 season. If this helps Chip keep Greatwood in the Oregon family for a few more years, that's fantastic.
Have a read of Moseley's piece and weigh in.
[UPDATE] - Here's some info thrown together from Helfrich's bio:
Mark Helfrich served as offensive coordinator at Colorado for three years, joining the Buff's program when Dan Hawkins became head coach in December 2005.
Prior coaching positions include: QBs coach at Arizona State from 2001-05 (also was passing game coordinator 2002-05); QBs coach at Boise State 1998-2001; offensive graduate assistant at Oregon 1997-98.
The bulk of Helfrich's success was during his time at ASU, where his QBs put up numbers that ranked in the top three of the Pac-10 all five years he was there, leading the league twice (2004, 2005) and finishing second in 2001.
TOP PLAYERS COACHED: All-conference Pac-10 Performers (1): Andrew Walter (ASU-second-team). NFL Players/Draft Picks (3): Ryan Dinwiddie (BSU), Bart Hendricks (BSU), Walter.
RECORD: Helfrich has coached in 122 Division I-A games as a full-time coach, owning a record of 67-55 (8-17 at Colorado, 26-10 at Boise State, 33-28 at Arizona State); he has coached in seven bowl games (on the winning end five times).