Simplicity is a good thing for sales to end users. Until recently the Vega has been sold on-line to enthusiasts who knew exactly what they were getting.
The Open Source nature of Android has really helped these enthusiasts.
Kernel source is made available by the best Android tablet manufacturers (Viewsonic and Advent included) in the knowledge that it will be used. New kernels are relatively easy to create if required because of this.
As has been pointed out already the Google Apps collection won't ever be certified for Android 2.2 on a tablet with no phone functionality. This is apparantly because Google do not want to be responsible for how they behave and appear on the supersized screen of a tablet. However Google do know that they will be used on tablets and take no active efforts to stop it - they could easily stop it, but they don't.
Don't be worried about the implied or potential actions of Google. They know exactly what is going on and whilst not being willing to take direct responsibility for the use of their apps on large screens there is tacit complicity that its going on.
There's an eco-system to be fed here and the market needs all the throughput that it can get even if its not officially recognised.
Screen angles and WiFi modules apart the hardware is bang up to date, at a relatively low price. Once the MoDaCo pack is installed its an iPad killer in many ways, whilst lacking the integrated Apple user experience.
So, if you know you are buying hardware that will require some simple tweaks to make the best of it the Vega is a great tablet (as are several others mentioned in the comments here).
If you want to see an iPad competitor out of the box, then wait for Honeycomb to ship on the hardware.
For the price, if you are in the UK, if you are a techie, its currently unbeatable.