The Nikon P90 is a great idea if you want the capability of a full size Digital SLR without the cost of or the messing about with different lenses. The Wide Angle, Macro and Zoom are well above anything else I've seen in this class of hybrid digital camera.
I got the Nikon P90 mainly because of it's amazing built in 24x optical zoom, to give me the ability to take pictures of birds (the feathered variety), without lugging several different cameras, lenses and the tripod all the time, just in case you came across a sudden opportunity, which would invariably pass by the time you got the DSLR set up.
On the up-side, the P90 does everything you need, it is relatively compact and light, the 3" LCD screen is high resolution and the electronic view-finder is reasonable. I prefer to use the electronic viewfinder as it is a more natural position to hold the camera and adds stability when hand-held as opposed to being on a tripod, also it conserves battery life.
The lag between pressing the shutter to being able to frame the next shot is about 2 seconds and is no slower on the highest photo quality setting than on the least, much faster than my Olympus compact C-765 but perhaps not as fast as a Canon DSLR, still it is fine for what the camera is.
On the down side, there is no live histogram facility, only when reviewing pictures after you have taken one! Also there are too many fancy features such as smile and blink warning, scene settings and features for dummies; why not just use Auto? The technology could then be diverted to having the much more useful live histogram.
A word of warning: You must remember to remove the lens cover before you switch it on, as the lens extends 3/4" when it powers up and if you forget, (like I do), causes an error message on the screen. Again some kind of sensor could prevent this, perhaps more useful than the probably never used features!