This will work with any app (some better than others, please report which apps worked/didn't work best for you). Will get apps you are downloading which were made for iPhone run in the iPad resolution so it's not all pixelated and such.
You will need to be jailbroken:
http://forum.ppcgeeks.com/showthread.php?t=119945
and have SSH access:
http://forum.ppcgeeks.com/showthread.php?t=119990
1) SSH into your iPad to
/var/mobile/Applications/. Choose the application of your choice (let's do facebook)
2) Download
plist editor from
Here
3) Find the
info.plist file and add these lines using plist editor (see my screenshot below)
<key>UIDeviceFamily</key>
<array>
<integer>1</integer>
<integer>2</integer>
</array>
note: Make sure to back-up this file before you make changes to it (just in case...)
4) Save the file, disconnect the iPad, and restart.
5) Check our your new resolution!