Earlier today, Our friend Tom Warren at Neowin.net posted some tantalizing new screenshots of Windows Live Messenger for iPhone, which he expects to become available in June, along with the rest of Wave 4, although some select testers may get early access before then.

The iPhone app “will include photo sharing, chat and a social stream for users”, according to Neowin, and will be a slimmed down version of the Mac version of Messenger.

Also according to a number of sources, at least a couple of new websites are slated to go live tomorrow (Apr 28). They are:

www.messengerpreview.com,

www.hotmailpreview.com and

www.windowslivepreview.com

(As we just posted, WindowsLivePreview.com went live already, at least for a little bit, where we caught a quick glimpse).

While we just got a peek at the new site, we’ve been able to confirm again a number of things we’ve been telling you about, including Facebook messaging integration:

…which opens a Facebook private message window directly from Messenger.

Looks like the Wave 4 news is about to start coming hot and heavy, although all indications are we won’t be able to begin to use it (legitimately, that is), until sometime around June, when the public beta is widely expected to become available.