It would be really nifty if the Text Find/Replace action had a realtime preview if used on a variable. Even something as simple as "found", "not found" or "invalid regexp" would be really handy.
(not that I don't know you guys have enough work on 6.0 as it is :))
At design time? Based on the default value of the variable? If you already know that the variable contents is static, why are you bothering to Find/Replace it at all?