Remote wipe, lock, and tracking software for iphone?

Do you have an Exchange Server?

If you do - that comes as standard as part of the Activesync Policies.

If not - then something like MobileMe I believe can do this for you.

I do have exchange server, and the iphones in question would be using the built in exchange app to pull emails.  Do you have any documentation on how this would be done?

Is activesync enabled by default?

Activesync is enabled by default.

What version of Exchange do you have?

Would not the phone have to be part of our domain somehow?  Does simply getting mail from the exchange server enable a connection that would allow a wipe to happen over it?

exchange 2007

you might also look at apple's www.me.com site as you can
Locate
Display a message or sound
Lock or
Wipe

using nothing more than apples tools, may need a an Apple care/cloud subscription

So simply inputting the exchange server information in the iphone (and thus being able to retrieve email, etc) enables all that functionality between exchange and the phone?

Yes if you are using Apple's email servers with a me.com account

Has nothing to do with your company's exchange servers.

If you setup the Policy to force a PIN (Password) and then add the exchange account to the iPhone, that will force the PIN on the iPhone and as a result of that action, you will be able to remotely wipe the iPhone if it is lost or stolen, which can be done via OWA.

I know this is closed, but i figure I add some of my knowledge.
I am on exchange 2003 and I downloaded a free web install from microsoft to query the accounts with enabled EAS.  This will also work for Exchange 2007. Please read below.
This gives me the ability to break the EAS connections as well as wipe the device forcefully (not having to change the users pin).  You will not be able to track it, but with the new iOS 5 Find my iPhone is free with the new iCloud.  I am not sure if you can provision the phone to have iCloud account and lock it down.  It is some to look into for future connections.

http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=22243

Download Guidance
There are three versions of the Exchange Server ActiveSync Web Adminstration Tool that you may download depending on the version of Exchange deployed in your organization.

3: for Exchange Server 2003 SP2 only deployments, please select the downloadable file named "MobileAdmin (Ex2003).exe".

2: for Exchange Server 2007 only or mixed Exchange environments (Exchange Server 2007 and 2003 SP2) where this tool will be installed on a 32-bit Windows Operating System, please select the downloadable file named "MobileAdmin (32-bit).msi".

3: for Exchange deployments similiar to the second deployment scenario above, but this tool will be installed on a 64bit Windows Operating System, please select the downloadable file named "MobileAdmin.msi".

Hey Bee, thanks a lot dude! :)

You are not able to change the pin from that interface though.  
This is strictly for breaking the sync connections or Wiping it.

Note: If you set the device to wipe and do not delete it from your EAS connection DB.  If the user tries to establish another sync it will re-run the wipe.  ;)