I had signed up for the promotion listed in Web flyer last month to get 10K Northwest miles from Sprint, but my request via the web never went through, and I got no response to a follow up email. So tonight I called Sprint at 1-877-455-8220 to see what was up. I asked the very nice rep to look up the best available offer, and what she came up with was 5K miles/month for 5 months!!! Way better than the deal I'd tried to sign up for. Persistence pays. She was willing to switch as many lines as I wanted at that rate (seperate order for each).

She also had better deals for ALL of Sprint's other partners than what were listed in Webflyer (None were as good as NW--max was 15 or 16K per line I think). And she gave me the online bonus, since I tried, and paid the switchover fee though she said most reps won't.
Happy travels everyone!

Welcome to FlyerTalk Steffo
It sure is great to see those miles. You were really lucky to find a super nice Sprint rep.
You might want check out the Sprint, MCI and ATT sites further on down the board. They are interesting reading.