I was reading through a thread like this on another forum, and I figured it would be nice to see what people thought over here 
For me:
MMS
Multiple recipient SMS
copy/paste
Different signatures for each email account

For me:
MMS
Multiple recipient SMS
copy/paste
Different signatures for each email account
Mac Pro Dual Quad-Core 3GHz, 9GB RAM, 150GB Raptor, 3 x 500GB, Dual 24" Dell LCD's, MOTU Traveler, Dual LSR4328P
iMac G5 20"
Powerbook G4 15", 1.67GHz, 1.5GB RAM
iPhone 8GB
iPod Video 30GB, Black
iMac G5 20"
Powerbook G4 15", 1.67GHz, 1.5GB RAM
iPhone 8GB
iPod Video 30GB, Black
Mac Pro Dual Quad-Core 3GHz, 9GB RAM, 150GB Raptor, 3 x 500GB, Dual 24" Dell LCD's, MOTU Traveler, Dual LSR4328P
iMac G5 20"
Powerbook G4 15", 1.67GHz, 1.5GB RAM
iPhone 8GB
iPod Video 30GB, Black
iMac G5 20"
Powerbook G4 15", 1.67GHz, 1.5GB RAM
iPhone 8GB
iPod Video 30GB, Black







Bug fixes
Ability to see track / podcast info
Preference to NOT have podcasts show up in album lists
(including coverflow - it looks stupid seeing the amateurish or non-existent cover art of a podcast right next to a classic album cover)
Todos in Calendar
Notes syncing to *somewhere* (though I suspect they're keeping this for Leopard's Mail)
Ability to add photo from a web page to Photos
Multi-delete ability in Mail