Nothing has been substantiated yet, but there are reports that Illinois has fired co-OC Chris Beatty. Given the tire fire that was Illinois football, it's probably no surprise that someone from that staff was going to be let go.
Edit: As BrownJuggarnaut pointed out in a post below, the story is now confirmed.
Here is a story from the Daily Illini: http://www.dailyillini.com/sports/men_sports/football/article_dcaa024a-578c-11e2-8ab8-001a4bcf6878.html
Key bits from the article include that the Illini were 119 out of 120 NCAA teams in total and scoring offense and that this is their fifth OC change since 2008.