Hewlett-Packard ( HPQ) estimates raised at Prudential: Prudential is raising its 2007 estimates on HPQ by 6 cents to $2.50 a share Melco PBL ( MPEL) Initiated at UBS: MPEL initiated with Neutral rating at UBS. Price target set at $22.20 and 2007 EPS estimates started at $0.20. Weight Watchers ( WTW) numbers raised at UBS: WTW numbers raised at UBS. Price target lifted to $55 from $53. 2007 EPS estimates raised to $2.55 from $2.46. Maintains Neutral rating.