I have a friend, Bob, a die-hard PC user that I've been trying to convert to Mac. He thought he was being funny by emailing me a question for the site:

Dear Mr. Macncell,

I was wondering if you have done any testing with the
Motorola
V710 from
Verizon? I currently own a Motorola V710 and I am considering
purchasing a Mac Mini with Bluetooth. Can I sync my contacts/calendar
on the phone
with
the Mac Mini?

I own a D-Link DBT-120 USB bluetooth adapter. Are there any
advantages to
paying the $50 and have bluetooth built into the mini? I don't
anticipate
that I will need the USB port the DBT-120 might take up.

I also plan to use my Bluetooth headset with the D-Link
DBT-120 on
the mini
so that I can place VOIP calls on the internet. Are you aware of any
issues with my planned configuration?

Thank you in advance for your thoughts.

Thanks for your question, Bob, and welcome to the wonderful
world of Mac!  I haven't done a test drive of the Motorola V710
yet, but I think I can still help you out.

Out of the box, the V710 can sync with your Mac, but only over
USB.  However, with a little playing of some iSync config
files, the V710 should work just as well over Bluetooth.  You
can find the great HowTo on MacOSXHints.com here.

As for the DBT-120
(link via Amazon), make sure you have the one that looks the image in
the Amazon
sponsored link in the middle column of the Mac 'n' Cell
website--also commonly referred to as "Rev. B2."  If you have
an earlier version, you won't be able to take advantage of bluetooth
headsets with your Mac.  Additionally, you may need to update
that adapter's firmware, which you can find here.
 To do so, download the software and attempt the install, the
software will tell you whether or not it's needed.

Personally, I would go with the internal bluetooth and WiFi on
the Mac mini.  I have a mini, and wish I had ordered it.
 You never know when you're going to need another open port to
plug in an iPod,
iPod
mini, iPod
shuffle, external
harddrive that looks like a Mac min, keyboard,
or Mighty
Mouse! (Links via Amazon)

The DBT-120 is, as far as I know, the only external bluetooth USB dongle that permits the use of headsets on a Mac (please comment below if you know of any others that work!).  I use this exact setup to place calls on Skype and Gizmo Project, and it should work fine for iChat AV as well--check--I just tried it and it works well!

If you don't already have a bluetooth headset, I recommend the Logitech
Mobile Freedom--again you can see it in the Amazon sponsored links.  It's what I use and it's fairly inexpensive as far as those devices go.  I find it works well whether I'm using it with a cell phone or my Mac.

Hope that helps, Bob.  Thanks for the email :-p