An update to the digital SLR, and one of the most affordable available. It's also the smallest fully-featured dSLR with an optical viewfinder that you can currently find. It costs around £315 for the body only, £390 with the 14-42mm standard kit lens, and £450 with the 14-42mm and 40-150mm lenses.
While the E-450 may not be as dinky as Panasonic's Micro Four Thirds-based Lumix DMC-G1, it comes very close. Also, while the DMC-G1 relies on a rather unsatisfactory electronic viewfinder, the E-450 has an optical viewfinder, which, while quite small and cramped, is still much clearer for composition and focusing than the very best EVF. Combine those facts with the inclusion of a sensor of the same size as the DMC-G1's, albeit of a slightly lower resolution, and the E-450 starts to look very attractive.
If there's a fly in the ointment, it's that the standard kit lens, the 14-42mm zoom, is slightly bigger than the Micro Four Thirds alternatives, but it's not a massive deal.
The E-450's body, layout and menu system benefit from incremental improvements made over the course of several updates since the release of the in 2006. The E-450 lacks a substantial handgrip, but, thanks to its lightweight body and some well-shaped grips to the front and rear, it's quite comfortable to hold.