Long Zheng, cool dude from Australia, put this table up on his (more famous and better written Blog). So i've decided to make a Kill List, what should Microsoft retain and what should they kill! And by kill, i mean the brand and service; by transferring current user accounts to the equivalent service (and add some <good>features to them).

So here is the Kill List

Service yahoo.jpg
Yahoo Equivalent
microsoft.jpg
Microsoft Equivalent
Content Portals Yahoo.com
Yahoo Auto
Yahoo Finances
Etc…
Msn.com
MSN Auto
MSN Finances
Etc…
Merge
Country-specific Content Portals ex. Yahoo7.com.au ex. Ninemsn.com
Account Management Yahoo ID
Transfer & Merge
Keep Open ID Support
Live ID
Personal Homepage My Yahoo! Live.com
Search Yahoo Search Live Search
Kill and bury,
Transfer dataset,patents
Casual gaming Yahoo Games MSN Games
Mapping Yahoo Maps Live Maps
Instant Messenger Yahoo Messenger Live Messenger
Mail Yahoo Mail Live Hotmail
Community Help Service Yahoo Answers Live QnA
Merge dataset
Photo Sharing Flickr Live Spaces
Add Flickr support to Live
Without goofing up Flickr
Blogging 360° Live Spaces
Widgets Yahoo Widgets Windows Sidebar
Search Advertising Yahoo Search Marketing

Microsoft adCenter
Both suck, come up with
better ideas.

Mobile Yahoo Mobile Live Mobile
Web Development Yahoo Developer Network
Merge/Unify
Keep Legacy Support
Dev.Live.com
Web Mashup Tools Yahoo Pipes Popfly
Website Services Yahoo Small Business Office Live
Geocities
Social Events Upcoming Live Events
Social Bookmarking del.icio.us (Advertising deal with Digg)
eCommerce alibaba  
Music Service Y! Music/MusicMatch
Transfer of service
Zune Marketplace, MSN Music
Music Software Music Jukebox
Transfer of features
Windows Media Player

Some of services are hard to compare and in general need to be gracefully merged. Branding is something of a prick, but i'm sure Microsoft will figure out something long and confusing, such as: Microsoft Live Search Marketing adCentre

Edit: let's not kill Live Hotmail.(see comments)

Edit Again: Yahoo Music Unlimited subscription service shuttered. Transfer of service to Rhapsody.