Yes there is a tech bulletin out on the 2007 Ventures, some of them have head bolts that are not torqued correctly. Normally it manifests it self as an oil leak. All you need to do is go to the dealer and ask them to check your VIN against the list on the tech bulletin. Takes about 10 minutes.
According to the tech rep I talked to at BIKETOBERFEST in Daytona last week, Yamaha will not be doing a recall, because this is not a safety item.
Be prepared to get some funny looks from the service manager when you first ask about this, seem they are not all up to speed on this issue, the local dealer here in Daytona looked very skeptical, but he did check and found that there was a tech bulletin and my bike was not included.