Up until now the only real way to get your Android apps running from
the memory card is to install a custom ROM. It looks like this is
going to be the same for a bit yet, but a bit of info has now appeared here to give you hope.
If they do whack this into Froyo it’ll be a massive improvement and one which has been requested many times over.
Link – code.google.com (via Androidandme)
Credit – Chris Pratt