Skype Video Call - feature requires an update to the existing application
Google+ w/ Video Hangouts - Google Talk is just a start w/ video
Pulse - It exists on WP7, would love to have something similar (colorss is about as close as it gets)
CNN - there's CNN Go, but it centers around Asian news.
Angry Birds Space - no announcements for MeeGo but one for WP7
VLC - one with a proper UI and streaming
Instagram - I don't use it, but it's all the rage right now
WhatsApp - unofficial app is coming, but an integrated version (notices and history) would be killer w/ group support
Adobe Ideas - I need this app w/ layers
Adobe PDF - Official app - FB Reader does only so much
Google Voice - Nothing against the existing App, but would love proper integration with the notifications/history, it's how I stay under my monthly SMS bill and has been that way for years - this is persuading me to go back to Android or WP7 (GoVoice is excellent)