Welcome to the 'club'! I'm a 300 fan too. (Also like the 505.) I just got the SOny 'premium' cover--overpriced but basically the same as the 505's stock cover, which works very well for me. Thin, easy to use (just fold it back), and the 300 still fits in my pocket with this cover on. I saw a few other cover options overseas, but none here in the US that are similar (i.e., using the holes in the spine to attach). I gave in and bought the Sony 300 cover, even though I think it should be a pack-in item.
