It would be nice to be able to filter rules text for mana symbols. For example, the following shows all the cards on Gatherer that include a black mana symbol in their text:

http://gatherer.wizards.com/Pages/Search/Default.aspx?text=+[{b}][/{b}]

Sorry, BBCode and gatherer URLs don't place nice together.

Agreed. It's particularly useful to folks making a Commander deck (where no card may have reference to colors not in the commander's colors).

Currently Sebi and company are working on a major overhaul of the trade interface. They review this forum regularly, and will let us know if/when this feature may be added.

Just wondering if this has been implemented yet.

+1. I'd really like this feature to be implemented.

Any news on this feature yet? Would be damned useful

Edit:
Oops, just noticed I necro'd this thread, apologies all, also, I found the solution (use {G} to search for green mana symbol for example) Just in case anyone else stumbles on this