I've been a happy iSilo user since 2003 (started on my Clie, then a couple of windows mobile devices and now I'm setting myself up to use it as my main reader on my new iPhone), but there's one feature I would love to see added.
How hard would it be to add a thumbnail feature? As in, you could specify a maximum image size to store in a document and it it exceeded that size, the image was kept as a smaller thumbnail you could tap, which would take you to the full size picture/image which you could scroll around in, or even zoom in/out of.
This would be an amazing feature for me personally.
'Abort or Retry, there is no Ignore.' - Yoda DOS