I have been using the P800 for about 6 months, my screen cracked, and the insurance stuffed me with the Treo 600.

Like the previous poster, I have only used the Treo for a few days. I agree with him on several of the points. However for most people, I am assuming availability of medical software won't be the deciding factor. Thus I am providing my opinion hoping that it will be helpful to others in making this most important decision :

- The one hand usability via the jogdial is far superior to the 5-way button on the Treo. With a few clicks and turns you can pretty much do anything on the P800. Especially if you have the Tracker software customized.

-I just can't get past the fact that Palm were stupid enough to build a $ 600 smartphone without native handwriting recognition. That is just downright stupid. How much effort would it have taken on their part? They might have as well offered the phone without the touchscreen and save us some money. Now I have to rely on some enthusiast's third party software that will probably keep crashing my phone. On top of that I have to pay for this most basic feature of any PDA.

- Picture caller ID, alarm clock (which I really very frequently used on my p800), call list, ability call people from missed calls with a few clicks, calling card information, voice command are all things that are a MUST in high end phones. I mean even free phones nowadays have most of these features. With the Treo these feature are either non-existent or very diffult to use. Does it make sense to go out and buy $ 15 - $ 20 apps for an alarm clock on a $ 600 phone? All this software could add up to hundreds. Before I forget, it appears that I have to buy $ 35 software just to navigate the SD card as a drive on my computer (I know i can just use an adapter but why?) With the SE P8-900 the software allows you to navigate the phones both internal and external memory.

-The fact that Palm engineers left space for a BT TR on the chip and Palm offfered it without BT is another incredible decision. Now not only there are no BT cards available for the Palm Os but even if there you will have to spend a 100 bux and will probably have some SD card sticking out in front of your phone. Again my $ 200 t68 had bluetooth so does pretty much every other Nokia and SE worldphone. BT is extremely useful with headsets (I was addicted to mine onthe P 800), is so much faster than IR in synchronizing, can be used as a wireless modem etc...etc... Now even new cars such as the Acura TL have support for bluetooth phones. Again according to my research I have to buy $ 30 software to use the Treo as a modem with my laptop.

- And of course the screen resolution and quality on the Treo is not even comparable to that of the P800 not to even mention the P900 if you can afford it. Obviously the ridiculous keyboard limited the size of the Treo screen. But I just don't see how any average size person type on these minitaure keys. If you are dying for a keyboard you can buy SE's chatboard for $ 10 and attach it to your P800 or P900. Again, if you are dying for a number pad both SE models come with one, but you can take them off if you don't care fore the added thickness.

-Now as you can see I have been quiet disappointed with several things that Palm left out such as bluetooth, handwriting recognition, useful software). BUT I just can't believe that a high end phone such as the Treo is shipped without a cradle. What PDA (other than the $ 49 Zire) come without a cradle. This is absolutely unbelivalbe. Now I know I can go out on Ebay and get one for $ 10 plus shipping but the point is WHY? Couldn't palm just include the damn thing? Sony even includes a beautiful set of stereo headphones which again go for an extra $ 29 if you want to go the Treo way.

Just about the only area where the Treo beats the P800 or P900 is Outlook sychronization. OL sychronization on the P phones is slow. Sony's software doesn't synch recurring appointments. If you a create a contact with a company name such as a restaurant in the P800, it will appear nameless in your Outlook probably because it doesn't have the File As field.

CONCLUSION: If you want a truly well-packaged phone, P800 or P900 is the way to go.

I haven't even taken out the screen protector off my Treo, if anyone is interested it's for sale. Everything other than the charger is still sealed. It's under 1 year warranty. I am going back to SE without a doubt.