How about a client with it's own wallet but no block chain and I set one node only which would be my own full client. Would something like this work? Would be great for people with a bunch of laptops or whatnot...
Electrum should be easy enough to change to support Litecoin. It uses Abe as its server db backend, and looking at the code I see that Abe should work with Litecoin out of the box. Bonus: deterministic wallet.
http://ecdsa.org/electrumhttps://bitcointalk.org/index.php?topic=50936.0