The Rockies shored up their second base situation earlier today by acquiring Mark Ellis from the Athletics, and GM Dan O'Dowd told Troy E. Renck of The Denver Post that he still has a "little" financial room to make another move (Twitter link).
Colorado has reportedly been calling other teams to gauge the pitching market, and they're one of several clubs showing interest in Hiroki Kuroda. The Rockies took on $1MM of the $3MM left on Ellis' contract and they started the year with a payroll just over $82MM. If they are willing to match last year's payroll ($84MM or so), they would still have another million bucks to play around with.