Think Secret reports that reliable sources have stated that Mac OS X 10.5 Leopard is currently planned to be released at WWDC in mid-June.
According to the site Leopard was scheduled for release towards the end of March but has been moved back.
"Leopard is shaping up to be a more significant release than anyone expected, with much more to come than any of the developer builds have led on," sources revealed to Think Secret.
The article also mentions that new iLife and iWork suites are likely to ship in the same timeframe. The site claims that Apple is toying with the idea of bundling at least one suite with Mac OS X.
Naming conventions on iLife and iWork could also take a change moving from using years in the name to being called "Leopard Edition". Freeing Apple from yearly refresh constraints.