Zap2it's Korbi and Matt Mitovich in his tvguide.com Mega Minute cast some light on two Terminator: the Sarah Connor Chronicles (T:tSCC) casting spoilers. (spoilers)

According to Matt Mitovich, Busy Philipps (ER, Dawson’s Creek, Freaks amd Geeks) will be joining the cast as a new neighbor for the Connors and will befriend Sarah.

Busy's character is described as "earthy/crunchy", a description which may have been shifted around from earlier descriptions of the Catherine Weaver character, a new technology conglom CEO played by Shirley Manson of Garbage.

Given the discussion at the Comic-Con T:tSCC panel of a rift between Sarah and John, Sarah may need a new friend as her baby messiah moves away from her and they stop filming so many scenes together. Not that John will entirely move out.

Zap2it's Korbi interviewed Thomas Dekker, Summer Glau, and Leven Rambin at the Fox upfronts about another new character, Riley. Leven Rambin (All My Children) will join the cast as Riley, a normal high school girl. John may be starting a "normal" teen romance as a form of rebellion against mom. Leven Rambin said that thus far, Sarah Connor's character does not approve of Riley, who is light hearted with a punk sensibility.

So it sounds like rift with mom and rampaging Cameron aside, John'll still be doing his homework.

Sources
http://www.imdb.com/name/nm0005311/
http://www.imdb.com/name/nm1628079/
http://community.tvguide.com/blog/TVGuide-News-Blog/Todays-News/700000044&start=45
http://www.youtube.com/watch?v=lLV5UJa2GsQ
http://blog.zap2it.com/korbitv/
http://www.youtube.com/watch?v=lLV5UJa2GsQ
http://terminatorthesarahconnorchroniclespromos.magnify.net/item/72XDR7CX7M1934Y5