Here's an interesting one, as title says it's a delay and overdrive from a single PT2399 made up by allesz over on the FSB forums. Warning, this is not true bypass so, at some settings you can hear delay bleed through the overdrive, but you can use both as standalone effects. This effects has made me think, maybe you can make the overdrive section a DOD 250 or an MXR Distortion+, or another single opamp overdrive effect.
The layout is verified.
There's a schematic and sound clips over there:
http://www.freestompboxes.org/viewtopic.php?f=28&t=25246Layout