The question has 3 parts
1/ What address book software to use
2/ What phone syncing software to use
3/ How to get the sync to work (Bluetooth or virtual COM, technical
settings for max speed, etc.?)

Summary of the problem
======================
I was using a Lotus notes 6.0 address book which I could synch
perfectly to my Nokia 6110 via infrared using Nokia's PCSync software
- this included street address fields.
I have now bought a Motorola V620 and after much difficulty I have it
"kind of" communicating to my WindowsXP sP2 pc with a Belkin USB
bluetooth adapter.  BTW Motorola does not provide bundled software
with the phone.  "kind of" means that 2 programs I have tried can sync
the phone to their proprietary phone book formats:
MOBILedit! Lite 1.94
mobile PhoneTools 3.19e1

I dont like these programs because they are ignoring the street
address fields in the V620 (mobile PhoneTools even deletes these after
a sync)

I dont like MOBILedit! becuase it wont read Notes or windows address
boks - how would I convert my data?  (I would have to add an x@x to
trick the email field to allow street addresses?)

When I tested mobile phonetools it was slow and cumbersome, and the
local outloook express was not updated with a new number on the phone
(although the phone was updated when I added an outlook number).

I dont like floAt's Mobile Agent 2.0.0.19 - while it seemed to connect
after I set it to access the COM9 virtual bluetooth port (native
bluetooth wouldnt work), I couldnt create a local address book
downloaded from the phone - I got this error message
Exception class: EStringListError
Exception message: List index out of bounds (3)
Exception address: 00422D3D

Also, there were 10 minutes when Mobile Agent was taking 99% CPU
power!!!  It seemed quite unstable and syncs went on forever.
I was never sure if I could sync with the "local" Mobile Agent
phonebook or if I needed everything in MS Outlook (I only have OL
express and lotus notes on my PC)

I dont think SyncML technolgy will help me because I want to sync via
bluetooth not some mobile internet site.

My understanding is this phone came out in the last 2 months and there
is no software that supports it properly.

Other apps I have not tried yet (not sure if they support bluetooth):
=====================================================================
DataPilot - only seems to support V600 and is USB cable only
Futuredial - only seems to support V600 and is USB cable only 
Quicklink Mobile - seems like it may support bluetooth but no mention
of what phones it supports!
http://www.smithmicro.com/default.tpl?cart=11071095291976078&group=product_full&sku=QLMWAKEE&prodview=intro
Oxygen Phone Manager does not seem to support this phone (didnt try)
since the phone apparently does not have the Symbian Operating System

================More background info
1/ The following problem happened to me with the Belkin USB bluetooth
drivers - but I fixed it as follows:
"invalid license key" problem - as documented
http://www.msi.com.tw/program/products/communication/cmu/pro_cmu_quide.php?UID=449
(I cannot find anything from Belkin)
http://www.amazon.com/exec/obidos/tg/detail/-/B00006HYM3/102-6369812-5777743?v=glance

The security seems to have been modified in the 1.4.2.10 drivers, btsec.dll
doesnt seem to be used anymore and the security is present in these 3 files

BTTray.exe (typically in c:\program files\widcomm)
BTStackServer.exe (lives in the same directory as BTTray.exe)
WBTAPI.DLL (lives in c:\windows\system32 or c:\winnt\system32)
http://forum.gsmhosting.com/vbb/showthread.php?t=106274

The following patch fixed this check - I assume I am not doing anthing
illegal because Belkin's drivers should work??!!
http://www.jonscaife.btinternet.co.uk/patch_v4.exe
==============================================
2/ Then there was the windows XP Service Pack 2 problem but this was
fixed with these instructions
http://www.belkin.com/uk/support/tech/BT-WINXPSP2.pdf
(I disbaled the windows XP driver)