My suggestions would be to utilize reverb at http://reverb.echo.nasa.gov/reverb/. First register if you have not already done so. In the search box type ASTER GDEM and Select Dataset --- note if you want a particular area this is the point where you select the box range in the map window to the left (very useful feature!).
ASTER GDEM Global Digital Elevation Model V002
Select "Search for Granules"
Now begins the tedious part where there are over 22,000 ASTER GDEM tiles that cover the globe however, the website only list 400 per page where there is an 'Add All on Page' button but no Add All option (i.e. 50 + pages to go through + load time).
Press the View Items in Cart (Shopping Cart), press the 'ALL' button that will pop up a new message 'All Items on Page Selected. Select All n Items in Cart'. Click on that link. At the bottom of the page select 'Order Selected' (no direct download is available).
Follow the appropriate steps including your order details (its free no worries) and on the following page select the 'Order Option - Not Set and Required' button to state the reason for the download (remember to use the apply to all function).
You will then receive an email entitled CM SHARED with directions for ftp pull on your selected data. From my limited experience, this usually takes approximatley one working day. Essentially the ftp and pull directory to connect will look like:
ftp://e4ftl01.cr.usgs.gov # Ftp Server
PullDir/0302595257dmDDFH # Pull Directory Example
This provides really fast download (unlike some other ftp sites Global Land Cover Facility) especially comming from Europe (5mb/s).
Sorry for the long answer to a rather simple procedure but as I write this I am actually downloading ASTER GDEMv2 data myself for the entire continous USA. Note ASTER GDEMv2 is not void filled (although improvements have been made), unlike others like SRTM V4.1 from http://srtm.csi.cgiar.org/ at 90m resolution.
To acquire NAIP for Oregon that includes the NIR band you must contact the OGEO office directly (gisgis.state.or.us or 503-378-2166). The NIR is not available on the download site.
When you refer to "historic" NAIP including the NIR band you are going to be somewhat out of luck. Many states still do not include NIR in their contracts and the USDA-APFO option of a NIR band was not officially added to the contract template, as part of NAIP, until 2009. To acquire this data you will have to go state by state. Colorado has an ftp site that you can download the current, quad-level, NAIP that includes the NIR.
I do not believe that Oregon added NIR until the last acquisition of NAIP, but there could be one additional year that includes NIR. For current NAIP (RGB only) for all states, APFO has a webmap service that can be added as a "GIS Server" in ArcGIS (http://gis.apfo.usda.gov/arcgis/services).
Best Answer
ASTER scenes are not captured in a regular, repeating grid like the path/row system of Landsat. Instead, they are more scattered due to the much narrower swath (only 60 km versus 180 km for Landsat), off-nadir capture, and imagery tasking. You can see the scene boundaries in GLOVIS:
The listing of ASTER repositories has a number of other locations where you can search for scenes. I've used NASA REVERB since it's the only repository (as of a few years ago) that offered level 2 data to NASA-approved users. If you really want to have an offline directory of all ASTER scenes, you would probably have to crawl through the ASTER data pool at LPDAAC and create geometries in a shapefile/geodatabase based on the bounding box coordinates in the XML metadata files: