You Google Voicers should know that when you record those conversations, Google is going to keep them, even if you record them. They will index them, build a profile on you based on your calls and sell the information for marketing purposes (its how they make $ on your clicks).
BTW: it is illegal in the US to record a phone call without the other party knowing...(hello Linda Tripp).
You could always use some old technology:
Cell Phone Recorder works as home phone recorder and cell phone recorder
Otherwise...dont look like it.