I'm happy to say that Macromedia MX Studio runs downright breezily with the added RAM. My vector animation program (Flash) runs handily through all of its functions. And this is all after sacrificing 1 Gig of RAM to another machine. You can play with the options of parallel slots, or replace just one side. It is recommended that you use the same brand and type of RAM (Identical even) on each side to optimize performance. For example, PC2700 of 512MB RAM on each side, giving you 1 full Gig, or just one 1-GB RAM chip on one side like I have right now. (The other backup machine has the the two 512's in it and it runs fine.) In fact they both run fine with just one Gigabyte of RAM each.
Once, I start getting into more advanced imaging such as AfterEffects and other complex processor-intensive apps, I'm going to be shopping for something Intel multi-core with around 2.4Ghz and 4 Gigs of RAM though. But some of us don't have the money for that kind of hardware right now.
No matter what type of your computer, PC or MAC, desktop or laptop, chances are there is a way to upgrade to more RAM to boost performance. So I suggest looking into it right now. Macs are great because they make these tasks relatively easy for the average to intermediate user. Most RAM replacements can be found on websites like eBay, Amazon, Tigerdirect and Newegg. This type of RAM can be bought for around 20 to 40 dollars a piece.
Lowendmac is a great website to go to, to read forums about souping up and hot-rodding old Macs (which are still quite great and hold their value like any other well-made product.) I am one of these who have switched to Mac and never gone back, so I swear by them and I think they are great machines. And no I don't work for Apple either.