Why is my Samsung Galaxy S constantly dropping its wifi connection? When I attach my Galaxy S to my home wifi network it will stay connected for about 1-2 minutes. After this the wifi icon will be enabled, however no connection seems to actually be there.

I've tried a few wifi re-enablers on the marketplace but they haven't been successful.
I would start at the router and look there first. Do a reboot of the router and see if it still happens. if it does, there should be logging in the admin of the router that you can turn on (if its not already) and maybe you can see something causing the drop. 

Try getting Wifi Analyzer from the android market (free) to check if your router is on the same channel as other networks around you. try to put your router on the "clearest" channel.