netflow advanced query & alerts needed

There have definitely been improvements in Netflow since I first started with LM, which I appreciate.  However, the query mechanism is still quite rudimentary compared to free tools (like NfSen (for example).  Please add an "advanced" query option where a tcpdump-style query can be created (and saved for later).  As a bonus, PLEASE make it possible to have saved queries generate alerts over a specified timeframe.