AppleInsider notes that UK based reseller of the iPhone, Carphone Warehouse has added four new inventory placeholders onto its system in recent days.

32GB iPhone

The four place holders refer to an iPhone labelled “v3″ but of interest is two place holders for “IPhone 32GbV3 Black” and “IPhone 32GbV3 White”.

It should be added that placeholders on inventory systems are not necessarily a sure sign of a future product, in many cases they are guesses by staff at the retailer. The placeholders however fit with rumours of a 32GB iPhone.

The new iPhone is expected to be announced at the WWDC 2009 opening keynote on June 8th at 10.00 a.m. pacific time.