Not a lot being offered is there? And I can't add anything either so that indicates to me that our market is fully priced. If interest rates rise the way some fear, savers and retirees will be able to double (2% to 4% on passbook accounts is no big deal, but it is still double

) returns from the bank so BHP (and other's) pathetic dividends will be less attractive and their prices will stagnate until PERs drop
I still don't think a property investor should decide to get some shares and then just buy the banks. Their performance is closely correlated to property so you get no diversification. Their div's look decent but they pay out a high percentage of profits. Their PERs (last time I looked) were around twelve which is too high. Traditionally they are below 10, and for good reason. (They don't actually OWN much other than a brand and a computer.)
I'm a big believer in being knowledgeable in more than just "buying houses" though. Therefore it is always a good time to buy shares, just not with 100% borrowed funds.
They are not my style but Cochlear or CSL are good growth and Ceramic Fuel Cells is a "green" stock with promise. AGL is a safe utility. None of these have correlation to the property cycle. No one here would suggest to a newbe to go out and buy the first house he sees. You must be discerning, and so too with shares and just looking for enough dividends to pay interest is simplistic.
In the interest of disclosure I have a small holding in one of the stocks mentioned.