wow, this is cool. lod3n, confronted by this heinous puzzle, wrote:

‘2 minutes in Photoshop. All too easy. So, where do I pick up my cake?

Increase contrast. Select the right wall of the maze using the magic wand. Select > Modify > Expand 4 pixels Create new layer. Fill with Red. Select > Modify > Contract 2 pixels. Delete. Now you’ve got a line tracing the solution. Manually clean up the outer edge, and connect the dots. Cake!’

Here’s the result. Seriously nifty!

(Update: wow, this got Dugg heavily — 17000 pageviews from Digg alone! Unfortunately that caused a bit of a server meltdown. Should be back now though…)