I'd like more features on SSMS
Formatting of t-sql - with the ability to alter the formatting rules
Improvements in intellisense - current version is a good start, but suggests too many wrong items
Code snippets
Something to outline/expand statements and transactions - so you can click a +/- next to a statement to select/hide find the end etc.
Search feature to find functions/procs/columns without having to query sys tables manually
Ability to get object defs/create/alter/drop code from t-sql - instead of having to navigate the object browser and right-click or, if thats too much to ask, just type the name of an object, select it and get the object browser to find that object.
And intellisense when connecting to older versions - I now have 2008 - but most of my work is connected to 2005 databases - no intellisense.