Although, texting would pretty much eliminate the need for them to thought speak, with the exception of Ax and Tobias. Also, they wouldn't have to worry about the phone lines being bugged or traced...Unless, of course, their cellphone providers turn out to be Controllers...But could they figure out ways to trace Text Messages? Probably.
Also, given that teens today tend to get sucked into trends, expensive clothing and reality TV, would these new Animorphs be reliable? I mean, would we be able to depend on a person like Rachel (an excessive shopoholic in the nineties) or a guy like Marco (who's taste for video games will only worsen with the invention of Call of Duty and the PS3)...Man, earth's screwed...