Check out the noise reducing earphones designed for
iphone 3g by OPT the mic is really good.

Enjoy better music at safer volume
Full Range Sound
High specification 10mm diameter speakers tuned to reproduce full rich bass with exceptional high end definition.
Noise Reduction Ear Tips
825 earphones comes with user selectable soft silicone ear tips in large, medium and small sizes, these ear tips are engineered to provide
a comfortable and excellent seal against background noise, so you can hear your music better at lower volumes. Laboratory tests indicate
that when properly sealed, these 825 earphones will reduce the background noise by more than 20dB
Hearing Protection
Opt has designed the earphones with care for a safe hearing, listening to music with poorly made earphones can cause irreparable damage to your hearing.
Many countries have laws specifying noise exposure limits in the work environment, usually no higher than 85dB in any 8 hour period.
Listening to music at volumes higher than 85dBA for extended periods can cause permanent damage to your hearing.
We carefully designed the 825 Element to delivery great music at lower and safer volumes, so you can enjoy your music longer.
Product Description
Type: in-ear
Speaker: Φ10mm open air with neodymium magnet
Frequency Response: 50Hz ~ 20KHz
Sensitivity: 95±3dB @ 1KHz
Impedance: 32±4Ω @ 1KHz
Ear tips: Hypoallergenic Silicon in three sizes (L, M, S).
Audio-Plug: 3.5mm 4 Pole Stereo Gold Plated (iPhone 2G compatible)
Cable length: 120cm
Colour: Black
A cool
iPhone accessory