Anyone have a Nikon D3000?
What exact tripod do you have for it?
You can attach any tripod (brand) to your camera. I would suggest one that is stable, light to carry and fits your budget.
I use a 60" Targus with my D3000, but it's relatively lightweight so if you're going to be using your tripod extensively, I would recommend getting a sturdier one from a camera store. All cameras have the same size tripod mount so you could attach any tripod to your camera.
I think you should go with 50" Inch Professional Tripod ~Including CASE!~ For all CAMERA/CAMCORER! NIKON D40 D40X D60 D80 D90 D3000 D5000 CANON REBEL D-SLR XT XS XTi T1i XSi 50D DCR-SR47 HC52 CX100 + Nearly Every CAMERA/CAMCORDER!
Extends to 50 Inches Tall, Folds to 16.5 Inches, Weighs Just Over One Pound!
2.5-Pound Load Capacity
Quick-Release Photo/Video Platform
3-Way, 360-Degree Swivel Panhead
Includes Nylon Carrying Case with Shoulder Strap