I'm not sure I agree with the consensus so far re an entry level DLSR...
Key points in your posts on this thread:
a) "a starter bridge camera for an 18 year old who wants more than a point and shoot "
b) "size is important to the lad, as it will be slung into a backpack along with school/uni books etc"
c) "something simple to use while he learns"
d) "a camera to record stuff he likes more than make pictures at this stage"
and the caveat:
e) "who is very clumsy/careless with stuff"
A superzoom (aka 'bridge camera') offers a range of capabilities in a single and simple package that is also fairly compact and quite light in weight.
The range of capabilities addresses the "more than a point-and-shoot", while the small size and light weight addresses the need for 'luggability'. The zoom ranges on the latest superzoom cameras typically from ~28mm to ~500mm in a single unit provides the vehicle for capturing opportunistic shots within a much greater range of distances than would an entry-level DSLR (with a maximum of ~120mm zoom).
Most of these superzoom cameras have some form of "Simple Mode" where the camera does most of the thinking, leaving the shooter to focus the subject and capturing it. Also available are "burst-mode" that allows multiple shots for a single depression of the shutter release.
All in all - and apart from the caveat of ruggedness - the superzoom option makes more sense from the perspective of the recipient, while the entry-level DSLR tends to satisfy the purist photographers out there.
The issue of ruggedness is probably going to be a challenge as most superzoom cameras are:
a) Built with weight reduction in mind - hence extensive use of plastics
b) Built for compactness rather than ruggedness
c) Built with a feature-count to boggle the mind
d) Built to also satisfy the unitiated via "Simple Mode" operation (DSLR?)
As a first tentative step into the more than point-and-shoot digiicam, the superzoom is an ideal candidate and, if the bug bites and the recipient wants to get into the complexities of more sophisticated cameras, who cares if the superzoom becomes a second-fiddle as the rate of technological progress in CCDs etc is making the DSLR option a moving target.
Some superzooms worth considering:
a) Canon PowerShot SX1 IS (~475quid)
http://www.cameralabs.com/reviews/Canon_PowerShot_SX1_IS/
b) Panasonic Lumix DMC-FZ28 (~275quid)
http://www.cameralabs.com/reviews/Panasonic_Lumix_DMC_FZ28/
I have the predecessor to the DMC-FZ28 - the DMC-FZ18 - and find it an ideal 'camera of opportunity' while travelling - mainly due to the zoom range and scene features plus its small, compact dimensions and relatively light weight.
If one has to choose between functional fit and ruggedness, I'd plump for functional fit every time.
PS: Optical Image Stabilisation is incorporated in virtually every superzoom (~500mm zoom demands it) and this comes in very handy for long range hand-held shots. Few entry-level DSLR cameras incorporate this capability.
My $0.02 worth...