at what age is technology right for kids?

So a friend and i were talking the other day about video games and things...
how the conversation come up is she was asking her 4yr old grand daughter to go and find her DS gamesystem to which the child replied she didn't know where it was. so i said to my friend DS at 4 really don't you think that is a bit much and she should have been older before getting such a toy.
she tells me that it's good for kids to have video game systems it teachs them to take care of their things and if they have nice things they won't want to run the roads as much when they are older. they will have something to stay home for. Her line of reasoning is that both of her sons turned out well and they always had the newest and best of everything at all times. That it's supposably proven a child with less then the best will be more sneaky then one who has everything? seriously?!?!
now i guess i am old school or down right mean but i don't let my 4 yr old on my computer i don't believe in teaching her to become hooked on electrionics. she has a toybox full of toys, a bookshelf full of books, a shelf full of dvd's (but she only gets 2 hours a day t.v. time) , we have board games for her and she can do up to 100 peice puzzles already. 
She can print her first name, working on her last name she's quite intelligent and her teachers always comment about how quickly she picks up on things and how well she is doing in her classes.
Am i wrong to be keeping her away from so much technology?
i take the time to read to her and with her, i lay on the floor and we do puzzles together, and when i am writing to my penpals she likes to write too so she gets me to help spell a name of a person and she copies it.
i see people handing 2 years IPHONES for the apps and all i can do is shake my head. My lil one gets to play karokee on the wii when she is behaving as a reward and that is the cat's meow to her. i just think if i give her too much she will become bored with being a child and stop using her imagaination and become concentrated on video and computer games. am i fussing too much or am i right?
i have decided to cave a little bit... i want to get her a leapster 2 for easter.