my treo 680 vs iphone vs Blackberry bold?

Well I can only answer a couple of your questions for sure as they're currently available with the iPhone 2.0 software.
1. You can currently jump to a certain contact with the search function at the top of your contact list simply by entering the letter in the search box (or you can simply touch the letter "D" in this case on the ABC scroll bar to the right of your contact list.
2. You can snooze your alarms for 5 or 10 minutes I believe but not for tasks or appointments at all. You are however allowed to set 2 reminders for each appointment you have in iCal on your phone
3. It does also sync your Entourage contacts and appointments. You can set this up through iTunes in your phone settings
4. You cannot send MMS with the phone yet nor have I heard of any implications of this feature being added in the future but you never know.. cross your fingers
5. You can view a list of appts and tasks in iCal as you would on your computer as well as view the day, week, and month ahead. Again it can sync with Entourage, iCal, Outlook, even PocketMac.
As for me I've been switching between my Blackberry Curve and my iPhone has been relegated to an iPod Touch due to its current limitations.. I love it though and simply refuse to part with it due to its super coolness so I say get one anyway and hold on to it..

You need to either stay with your Palm (or move up to a newer model) or go to a BB. You will not be happy with the iPhone.

If you're into MMS, the iPhone is not for you.

Keep your treo 680. I might go back myself.

iphone is scabbed over tech. (far from bleeding edge)

(but also has some really cool stuff&fluff)

I like it better than I ever liked my Treo.

If movies, music, and Web are not part of your requirements then the iPhone is not for you. It does not do many of the task related things you want. that is OK for many of us, as is does other things very well.

But based on your needs the iPhone would be a disappointment. Personally, I love mine much better then the Blackberry or Windows Mobile - but my reqs are different then yours.

I think that'll probably be your best bet for now.. I went back to my Curve for similar reasons.. I hope with the next software update or maybe the next model (whichever is first) a lot of its simple shortcomings are addressed. It has a lot of cool things going for it but it surprisingly doesn't do a lot of the things even the most basic phones do.. It seems that Apple has a little more work to do to get the actual "phone" part of the iPhone right. I have no doubt they'll get it together though.. I hope its soon as I love the darned thing.. I just can't get it to do some of the things my BB does with relative ease...

I've never used Entourage. Our company went to an internet based intranet years ago so I do everything through the web.

I can understand your point though. For what you need, the iPhone isn't the best option.