I agree with Patrick - THE point about Bridge cameras is that you have everything (if you include the the add-on macro lens) from telephoto to close-up in one package for less than the cost of Gruditch's lens! And I'm sure that many of these users produce images as good as many DSLR owners - just look at this forum! I had an FZ50 for 2 years before I finally went DSLR and loved it! And I know lecturers and professionals that use compacts, albeit Leica - which BTW can be had for less than £400 - for assignments.
Now, I agree with Gary that image quality will not match a DSLR - so for those who want that extra 10% to 20% to take their photography forward, this is the way to go.
But if you want to learn WHY you need a DSLR, then use a Bridge or Compact first. Their big advantages are weight and handling, ease-of-use, in-camera image stabilisation and a better Depth of Field on the smaller sensor they use. The disadvantages are that they are technically limited in the sorts of things that you can do if you don't use the pre-programmed modes, images can be noisy and the manual controls are often clumsy and difficult to use, except in manual focus (on the FZ50) where the centre 1/3rd of the image is magnified for close focal control - Canon, Nikon, et al please note! With regards to weight - Gary, if you can get a macro, and telephoto-zoom and DSLR body all at less than 650 grams (the weight of the FZ50) then let me know!
So, if you have reasonable experience of photography - get a DSLR; if you want to learn and not spend a fortune AND get very decent results, try the Bridge/Compact route.
And don't get browbeaten by all these DSLR owners (like me and Gary

also) who now have to justify all that extra expense somehow!
NickB