Dell might be new to the keep-our-gadgets-a-secret game because VGP-BPS9/S Engadget just stumbled upon the motherload of all leaks. Well, we’re talking volume here because we’ve yet to see any smartphones come from Dell that just blow us out of the water. The first, pictured above, is the Dell Lightning. It’s a portrait slider, a form factor you don’t see too often these days, that has a full QWERTY keyboard instead of T9 or the two-letters-per-key, SureType style keyboard. Always a bonus. Best of all? It’s a Windows Phone 7 handset.

The lightning sports a 1GHz Sony VGP-BPS8 Battery Snapdragon processor, 4.1-inch WVGA OLED display, 512MB RAM, and will be available for both AT&T and T-Mobile. It also looks like these will be upgraded to LTE once, well, once LTE actually more widely available in 2011. But wait, there’s more!

What you see above is the Dell Thunder, sitting pretty and looking sleek. It’s running Android 2.1 but features Dell’s Akku Dell TK330 very own UI over it called “Stage.” According to Engadget, this new UI will also VGP-BPS9/B bring social networking integration – much like we’ve seen on HTC’s Sense and Motorola’s Motoblur. Like the Lightning, the Thunder has a 4.1-inch WVGA OLED capacitive touchscreen display. For you couch potatoes, word is that there will be a dedicated Hulu application for the Thunder. Fingers crossed!]

That thin, 11.5mm Android handset you’re looking at above is the Dell Flash, and it’s Akku Dell P726C going to be running Android “Froyo” when it hits. It has a 3.5-inch WVGA LCD display, 5MP autofocus camera, Wi-Fi and an 800MHz processor. It’s also going to support up to 64GB microSD cards, whenever those things become available.

Here we have the Dell Smoke, which is quite Akku Dell T118C a long looking phone albeit very thin. It’s also running Android Froyo on a smallish 2.8-inch QVGA display. It looks like Dell is very much in favor of keeping us all in portrait mode with both of its full QWERTY handsets featured that way. The Smoke also runs an 800MHz processor, has a 5MP camera, 14.4Mbps HSPA capable, Wi-Fi, Bluetooth 2.1 + EDR, and comes in a thin and sexy 12mm package.

While we’re not entirely sure when these sleek handsets will become available, it’s evident that Dell is serious about its smartphone business Akku HP Compaq NX7400 and we’re happy to see the latest from Android, Sony VGP-BPS9A/B Battery as well as Windows Phone 7, to be the operating systems of choice on these devices.