Bluetooth mouse lag

So here is the situation: I have a Macbook Pro (early 2009 model) with an Apple wireless keyboard and a Logitech V270 bluetooth mouse. Recently, I've been experiencing mouse lag (to the point where I can hardly even use the mouse anymore). The lag is intermittent, but is there more often than not. I've been pounding my head searching for a solution to this problem, and after scouring forums and trying different solutions, I gave up completely on finding a remedy. But before I threw in the towel, I tried one more thing: I disabled the bluetooth on the Apple keyboard and tested the mouse. To my amazement, it worked perfectly! I re-enabled the keyboard, and sure enough the lag returned. Now that I have isolated the cause of the problem, I was wondering if anyone had a solution that would allow me to continue using both my keyboard and mouse? (I have my MacBook on a stand, so it would be impractical to not have one or the other).
Any help here would be greatly appreciated!

Update:
Upgraded to 10.6.5 - No difference..
Changed/tried all wifi channels - No change to problem.
Tried a Mac Mouse - slightly less effect but still unusable.
Tried a USB BT dongle type mouse (no using internal BT AP) - Same issue
Tried on a friends Wireless Network - Problem only slightly evident - to be expected as this was a slow network at about 1.9MB/s, a transfer speed that does not show the problem.
Tried using a Netgear wireless intBT mouse router - Problem is only slightly evident on Mac Mighty Mouse, worse on Logitech, evident slightly on ext BT mouse.
With the Wireless nw running a transfer at 3MB/s, this Network speed drops down to a very slow speed when the "Set up Bluetooth Device" utility is initiated.
So given that this issue is also experienced by MacBook owners when using BT mouse while doing a File transfer via USB external HDD, or Time Machine. My conclutions are either:
1.
The USB ports, BT chipsset and Airport Chipset are all using the same data bus in the Macbook.
This data bus is not capable of running a high speed, contiguous data transfer in a single direction AND transfer BT wireless data at the same time. Apple Architects may be able to work around this issue by appling higher priority to BT data transfer tasks (Mouse), as it does when the "Set up Bluetooth Device" utility is running.
or
2. The BT wireless hardare is eisily susseptable to RF interference. This dont explain USB drive influences however.
My best bet is to log a Hardware repair request with Apple, as this is indeed a Hardware issue.

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ethernet cable + bluetooth mouse + network traffic = no mouse lag
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Message was edited by: for_sean

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Message Edited by eloquentloser on 10-Feb-2008 07:06 AM

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