i bumped up to 2 gigs. it makes a huge difference. you'll notice a little when you go an extra 512. i reccomend going another gig. 2 512 sticks of ram. depending on the chipset of your computer, there is a feature called "dual channel" where the 2 sticks split the read and write process. you'll notice a big difference with that. plus ram is cheap as all hell right now. buy while its hot.
R.I.P.
Dilla