iPhone OS 3.0

Awesome update. There seems to be one issue -- syncing contacts. I have them syncing over the web to google contacts. When I upgraded to 3.0, a TON of duplicate contacts appeared, as well as some that I didn't put in there in the first place (google's "suggested contacts" -- lots of sale-######@craigslist.org, etc). There seem to be 2 workarounds:

1. If you have a mac, create a blank group in mac contacts and choose to sync with that group, as well as over the web w/ google. Somehow that works, but I don't have a mac, so I didn't pay much attn.

The one that worked for me was:
2. Choose "overwrite existing contacts" in the Info tab on your iPhone in iTunes. Also, on the iPhone itself, go to Settings - Mail, Contacts and Calendars, and select your account (xxxx@gmail.com), that says "Contacts, Calendars" under it. Turn off Contacts and Calendars, and when the pop-up comes up, choose "Delete." That will clear your iPhone of some of its contacts. Then, turn off contact syncing from within iTunes. Sync your iPhone. Go back to the menu you were at on your iPhone, and turn back on the contacts and calendars, and when the pop-up comes up, choose "Delete" again. Now, you are writing to a blank iPhone. Phew.

Thanks, http://discussions.apple.com/thread.jspa?threadID=2048666.

Edit: the most useful iPhone/gCal link: m.google.com/sync (from your iPhone).