There have been a lot of foreclosures in N. Natomas and the neighborhood is changing for the worse. Things were really bad last summer when the city was having local community meetings about crime. Since those meetings the area has improved somewhat as the police have increase patrols in the area.
cbs13.com - Natomas Residents, Police To Meet About Crime
If I was going to rent out there, I would make sure I got a place with a garage and I would garage my car. If you search the forum archives, you can find people who will describe which HOA's they think are better and worse.
You might also want to check out the police log on Natomas Buzz. Basically it points which areas police were responding to crimes in Natomas.
natomas buzz
and you might want to plug in any homes you are thinking about renting in Natomas into the Sacbee's crime mapper.
Online feature - Crimemapper - sacbee.com