Question for Linux community!

I am interested and looking forward to get a smartphone or a personal data assistant with calendar/email/contacts just like the iphone does.

My intention is to be able to sync my smartphone's data with my home server that actually carries my PIM applications. Basically, during the day when I am not home I will modify or add/remove data from the phone. When I arrive home I would like to be able to sync my changes to my server. My laptop will be reconfigured to retrieve and sync from that server.

Proudly running with Slackware on ALL my machines (gotta love Slack!), and Apple being **** by not supporting open source and linux environment, it seems that it will be difficult to have something working out of the box and will probably require jail-breaking the device, etc.. I don't want to rely on external services such as Google calendar except for the email from Gmail.

So I have several questions for you guys! Answer the ones you'd like.

1-does anybody actually did what I want to do? If so, what are you doing?
2-Which smart phone would you recommend for improved compatibility with Linux boxes? If not, would you jailbreak?
3-If iphone is your preference, would you wait for the 4th generation to be released?
4-Which Linux application would you recommend to act as a PIM server? I already searched and found Zimbra.... comments on this?

I guess thats it for today! Thanks a lot guys! I will wait for your replies!!

Ciao!

As I see, nobody is doing the same thing??