I've got it pretty bad too, although most of it has been with cheap lenses, thank goodness.
In the last month, I've bought...
Sigma 17-70
Quantaray 70-300 LDO
Sears 70-210/4 (which I'm going to have to do the Ricoh pin removal surgery on once I get it)
Vivitar series 1 70-210/2.8-4
Vivitar 2x macro teleconverter
The Sigma 17-70 is staying in the bag for sure, but I'm going to have to have a shootout between the Quantaray, Sears, and Vivitar once I have them all and decide on which one I should keep. I've also got a F70-210 that definitely is a keeper, but I wanted another one in the same range that's a little quieter and easier to zoom for the situations where I'd rather not have a noisy AF and need to zoom fairly quickly.
I still haven't gotten the macro teleconverter yet, so I can't say for sure on that one yet until I try it. It's been a week since I won the auction on Fleabay and no teleconverter; I emailed the seller to find out when I might expect to be getting it.
I found out today that our local camera store is going out of business (after I bought all these lenses, of course), so I'm going to try and get down there sometime this week to see what kind of deals I can get on accessory type items.
Heather