im having the same type of issues scottyboy is having..
i've done it all.. i've adjusted my firewalls accordingly, i've turned from dynamic to static, redone all my ip's etc.. fixed up my router as explained and suggested..
out of 6 days 2 days were very very great. the other 4 just sucked badly. so im assuming Lord is prolly right, but with that in mind my confusion is, "i just got cable at my current house" before this anywhere else i was at with say my laptop etc.. i downloaded with ease and sufficency.
so i think theres something else were all missing.. would be nice to know what it is, if anyone else knows or has any ideas.
just to save time and posts
im running
winxp pro sp2
norton
runnin
dlink wireless router di424
2gigs kingston ddr
240gigs hd's
geforce 6800gt
i have this pc
and 2 laptops i use "wirelessly" on my network.
and both are affected by this issue just like my main pc.