using a PC as a bluetooth headset

I need your expert opinions..... here is what I want to do...

I don't want to have a home line anymore... only cell phone... now the problem with that, is that I will only have 1 funtional handset in the house... and this is not a good thing, so I got thinking.. isn't there a way to extend my cell phone to other handsents using my PC and wireless network ???

I have a siemens Bluetooth enabled phone, so I thought I can get a Bluetooth dongle for my PC (effectivly connecting my phone and my PC together through bluetooth). Once I have my PC acting as a headset for my phone, I can maybe use my 802.11b wireless network @ home to push my cell phone to wirless handsets @ home... at least this way if someone calls me, I can pickup the call from any handset.. (i don't care about dialing out.. even if I can ONLY dial from the cell phone, but receive calls on all the phones)... this way, the PC and 802.11b network will be like a bluetooth headet hub, and my "headsets" will be the hosts connecting the hub....

my question is: can it be done ???? can I use my PC as a bluetooth headset using a soft phone application ?? and can I push the soft phone via my wireless network to other phones ??? being PSTN or IP phones????

please help.... I am loking everywhere and can't sem to find any info....

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well... I ffound something... it's not bluetooth with a PC, but it's darn close....

http://www.coolproductz.com/dockntalk.htm

the box links up to my phone via bluetooth, and shares the cell line with the exisiting wiring in the home.. no need for a wired line with a number.. all you ned is the telephone wiring in the house and you plug the bix in an RJ-11 plug.... the box will sgoot the signal over the wire... they say it can make 3 phones ring.. I am not sure if I can use it to dial out though... I have to do some more research.