I am hardly slamming the Pre. It is an excellent beginning. Remember, Web OS is in its 1.0 iteration, whereas the iPhone is at 3.0 and Palm OS was at 4.0 in the i500.

But it would be nice if Web OS would allow me to search my calendar, as Palm OS did. I have no doubt that that functionality will come eventually, but it would be nice to have it now.

What I miss most about the i500 is its voice dialing capability. Oh yes, and the fact that I didn't lose all my speed dialing settings each time I synced with my computer (although I did each time I had to hard reset).
Perhaps its a sign of senility to come, but I found it a whole lot easier to verbally ask the i500 to dial home or to dial my office voicemail, or my sister or daughters or whomever, than to try to remember which letter or number I had assigned to each of them.

As for Classic, I miss, among others, CityTime and Tube 2 and my French English and English French dictionaries. I have not yet tried to port my English/English dictionary to Classic, but am not optimistic.