In addition to CoolCat's adpaters and the Pc-Mobile adapters, there appears to be a new adapter from Pocket PC Techs for the 7135 at http://www.pocketpctechs.com/PPCTHSA.asp. The one they've got for the 7135 has the attached microphone. I called and asked about getting one for the 7135 with the two plugs like the ones they have for T-Mobile. Apparently they had some production problems (i.e., they used the wrong pin-outs ), but they said that the two-plug variety should be available in a couple of weeks.

Anyone have any experience with these yet? I plan to buy one of the two plug variety and I will report back when I get it.