flooding has not effected the SSD market, only the HDD market. SSDs are steadily declining ~$5 every month or two for the drives I am looking at, and with a jump down in price when a new fab process is released that causes the chips to dramatically decrease in price (this is why newer/faster drives are cheaper or equal in price/GB than older drives). My best guess (and it simply is a guess, nothing more) is that we will see $1/GB this fall, and less than that with rebates. For high end drives I would expect to see $1/GB after rebates in the same time frame. Once the price hits $1/GB I expect prices to stall out for a little bit as it is the magical price people are waiting for before switching over. A year from now is way to far to guess, but suffice to guess that it would be less than $1/GB... just how much less nobody could say.
All that said; It really does not matter what future prices will be, there are some fairly reasonably priced drives on the market (well... reasonable after rebate lol), and as both a cheapskate and an SSD owner I have to say that they are worth what you pay for right now. Nothing breathes new life into an older system like an SSD will. I thought my wife's old C2Duo was getting a little slow, but throwing in a SSD really boosted things considerably. Granted, it is not going to add a single FPS to your games, but program load times turn to nothing, and it just makes windows feel so fluid and transparent. If you can afford one I would say jump on a cheap but quality drive now, you will not regret it!
Here's a few decent looking deals with rebates:
60GB for an OS and few programs (My wife has the solid3 which I purchased for $80 after rebate last summer, and the Vertex series is much better):
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227737
120GB for OS, programs, and a game or two:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220603
180GB for OS, Programs, and a 'normal' load of games:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233211
Just remember that whatever drive you choose, make sure you only use a max of 80% of the drive (just like a mechanical drive), after 80% usage there will begin to be a performance hit which will get worse the fuller it gets. My wife's PC has Win7, Office, some audio editing software, a few utilities I installed, and a few videos cluttering the desktop and her usage is just under 30GB. Your average game is ~5-10GB per game on top of that. I would highly suggest reading some articles about optimizing performance and life of the drive (disabling write caching, enabling AHCI, etc.) before you install it, but even without those it will run circles around what you are use to. The problem comes more later after you wish you could get a little more out of it and you realize that some things like AHCI require a reformat of the system... which will make you put it off if you don't do it in the first place.
Lastly, if running a newer x68 chipset mobo I would suggest looking into a smaller 60GB drive and using it as a cache (google Intel SRT), or purchasing a cache class drive like a synapse drive. It gives you the space advantage of your traditional HDD, but allows you to purchase a smaller drive. Sure, you do not get the full performance of the SSD, but it makes file management much simpler and is still a huge step above having a traditional HDD. However, only do it if you cannot afford a SSD large enough for all of your files.