Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_0_2 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5C1 Safari/525.20)
I use the Motorola H700 and it works well for me. It is very compact and syncs up really quickly when I turn it on. I bought it for the original iPhone at first but now I use of with my iPhone 3G. It has worked well with both.