If it helps, here is how I find bride pics. I'd love for lots of people to find lots of pics to share. osreb clearly has the all-time source (or two or ten), but here is the process I use.
The URL
http://picasaweb.google.com/lh/view?...&orderby=date# will return a search in Picasa which shows you two or three pictures from each of the most recent albums containing the word "wedding." This is important because using the regular Picasa search for the word "wedding" (which produces this URL
http://picasaweb.google.com/lh/view?...sc=G&filter=1#) doesn't order them by date and you get some Picasa random results and certainly not all the results.
Once I get the results page, I right click on the user name under a picture and open it in a new tab. This shows all of their albums. I then go into the wedding album and view the pics. If there is nothing good, close the tab and go back to the search. If you take too long you sometimes need to refresh the search page to get it to let you click for a second page, etc.
In Picasa, the pictures they show are not full size. If you simply right-click and "save as" the pic they show, you get a low res pic. Don't do this. When you click to view a specific pic, in the top right frame they tell you the dimensions of the original pic. The default size in Picasa is 1600x1200 I think, and if you use the "Download" drop-down menu at the top, it will download the picture in a maximum of 1600x1200 (or smaller if the original uploaded pic is smaller).
However, you can get the original image. Here is an example from today.
http://picasaweb.google.com/lhhue154...44905384852354 shows a picture where the original is 4272x2848 pixels. If you simply right click the picture they're showing, you'll get a small pic. If you use the Download menu, you'll get a 1600x1200 pic. However, if you go to the main album (click "View all") you'll see an RSS link in the right pane. When you click on this link you go here
http://picasaweb.google.com/data/fee...photo&hl=en_US, and you'll see all the pics as you scroll down. Under each pic you'll see "Media Files" and a link to the image file. So, if you right click and open this in a new tab, you'll get this URL
http://lh4.ggpht.com/_ifb4sTuID3M/TR.../_IMG_0180.JPG which is the 1600x1200 size of this image -- the same as if you used the Download menu.
Now here's the trick. At the end of the URL you see LPnDD00XbJo/_IMG_0180.JPG. If you insert a /d right before the image name making it LPnDD00XbJo/d/_IMG_0180.JPG it will open a pop up allowing you to download and save the pic in its original image size of 4272x2848.
OK, now once you have this down, we begin to search on other terms than simply "wedding." I primarily do this by using translations of the word wedding in other languages. So, we go back to our original Picasa search for most recent albums which was
http://picasaweb.google.com/lh/view?...sc=G&filter=1#, and we replace the word "wedding" with other translations like:
http://picasaweb.google.com/lh/view?...&orderby=date#
http://picasaweb.google.com/lh/view?...&orderby=date#
http://picasaweb.google.com/lh/view?...&orderby=date#
http://picasaweb.google.com/lh/view?...&orderby=date#
http://picasaweb.google.com/lh/view?...&orderby=date#
http://picasaweb.google.com/lh/view?...&orderby=date#
I hope this provides some fun and some good results.