It would be useful to provide an working version of VS2008's "Find All References" for a varaiable used in BIDS.
1) Select variable - from variables panel if possible or from a dialog box filtering by variable containment hierarchy
2) Show components that use that variable for example
a) Read-only variable list
b) Read-write variable list
c) Used within a property expression
d) Used within a derived column
e) Used within a conditional split