From ModMyi - Wiki
Other.artwork file located in /System/Library/Frameworks/UIKit.framework/
Not a complete listing as you can tell. Just the ones I've figured out so far.
Other-ver111_4.png - bottom half of search bar in safari and google maps (Image 1)
Other-ver111_97.png - top half of search bar in safari and google maps (Image 1)
Other-ver111_113.png - notification circle within phone app (Image 12)
Other-ver111_117.png - bottom bar in ipod, itunes, clock, phone & youtube (Image 2)
Other-ver111_119.png - bottom bar in mail, google maps and portrait safari (Image 1)
Other-ver111_120.png - bottom bar in landscape safari (Image 3)
Other-ver111_161.png - bottom bar in photos (Image 5)
Other-ver111_169.png - top bar on lock screen, when syncing, & when receiving a call (Image 6)
Other-ver111_175.png - bar behind artist, album, and song title in ipod (Image 7)
Other-ver111_179.png - top bar in photos and when editing stocks (Image 5)
Other-ver111_181.png - top bar when adding a stock (Image 11)
Other-ver111_184.png - top bar for the apps (Image 2)
Other-ver111_187.png - top bar when adding calendar event, mail contact, google maps bookmark, clock city, text message contact (Image 8)
Other-ver111_192.png - springboard circles that represent a page (Image 4)
Other-ver111_193.png - image for circle of currently selected page on springboard (Image 4)
Other-ver111_199.png - section behind hour/minutes/am or pm when adding alarm (Image 9)
Other-ver111_201.png - left side of bottom half of add alarm (Image 9)
Other-ver111_204.png - middle of bottom half of add alarm (Image 9)
Other-ver111_206.png - right side of bottom half of add alarm (Image 9)
Other-ver111_209.png - 4 lines in middle of add alarm (Image 9)
Other-ver111_210.png - 3 squares in middle of add alarm (Image 9)
Other-ver111_212.png - 3 rectangles down middle of add alarm and 2 rectangles in timer section (Image 9& 16)
Other-ver111_215.png - background for the applications (Image 2)
Other-ver111_230.png - bar that shows up on top of circle when deleting things (Image 10)
Other-ver111_247.png - shadow at bottom of the last clock and at bottom of page in world clock (Image 10)
Other-ver111_258.png - voicemail progress bar (Image 14)
Other-ver111_269.png - when viewing contacts, the highlight for the current letter (Image 12)
Other-ver111_270.png - when viewing contacts, the highlight for the letter spacers (Image 12)
Other-ver111_273.png - highlight of current tab selected in phone, google maps, etc (Image 13)
Other-ver111_276.png - Spacer for tabs in phone, google maps, etc (Image 13)
Other-ver111_298.png - overlay of opposite the selected on/off switch (Image 17)
Other-ver111_312.png - the color of ON when it is selected in Setting (Image 17)
Other-ver111_313.png - the color of ON when it is selected for Airplane Mode
Other-ver111_315.png - the color of OFF when it is selected (Image 17)
Other-ver111_323.png - highlight when you click on an email/text/song etc (Image 15)
Other-ver111_331.png - left side of timer (Image 16)
Other-ver111_332.png - middle of timer (Image 16)
Other-ver111_333.png - right side of timer (Image 16)
Other-ver111_335.png - spacer in timer (Image 16)
Other-ver111_336.png - overlay of minutes/seconds in timer (Image 16)
Other-ver111_338.png - background of minutes/seconds in timer (Image 16)
Images 1 / 2 / 3

Images 4/ 5 / 6

Images 7 / 8 / 9

Images 10 / 11 / 12

Images 13 / 14 / 15

Images 16 / 17
Note: In other Firmware versions some of these may have changed. On 1.1.4 (and presumable 1.1.3 as the file name indicates) at least one of these has been found to have changed. Below are listings that have been found to be different.
Other-ver113_169.png - Shadow below search bar when search history suggestions appear that match your string