While the iPad and Macs may be pretty close in terms of temperature (hot), in terms of popularity, the iPad is reportedly substantially surpassing its more traditional companion.  Hot off reports that the iPad Wi-Fi version hit sales in excess of 1 million units in under a month, analyst Mike Abramsky of RBC Capital Markets bumped his estimate of 2010 iPad sales from 5 million to 8 million.

The bullish new estimate comes amid Abramsky's claim that the iPad is selling about 200,000 iPads a week, versus 110,000 Macs a week.  Based on first quarter 2010 Apple sales figures, the iPhone may still hold an edge over the iPad, as it is estimated to be selling around 245,000 units a week.

The iPad may be cannibalizing iPod or Mac sales to a small extent, but according to recent surveys most buyers look at it as fulfilling a different personal electronics role.  According to a recent survey by UBS analyst Maynard Um, most iPad buyers don't look at the device as a replacement for their Mac or PC.

Some analysts are predicting a "halo effect", as with Apple's past introductions of new products like the iPod or iPhone.  The idea here is that increased iPad sales will actually fuel sales of other Apple products like Macs or iPhones by creating new fans.

Apple is coming off a couple of strong quarters, in which posted massive profits.  Its 3G enabled iPad launched in the U.S. in late April and will launch internationally at the end of this month.  The international launch of the 3G version was delayed because of shortages in the U.S.

If there's one cloud in Apple's sunny sky, it's the brewing storm of tablets from the likes of Google (using Android or Chrome OS) and HP (using webOS from the recently acquired Palm).  With Android having just passed Apple in smart phone sales, Apple has to be more than a little worried about how its going to be able to maintain its early lead, this time around.