What are Sony playing at?

Generally speaking I like Sony kit a lot and will certainly look at it when cost is not a consideration but I sometimes wonder if they are playing games with people.

Take the Sony memory stick. There is a plethora of memory cards around these days, I have SD, XD and Memory Stick based equipment and I find it ridiculous that I cannot use one card for everything. This can only happen in the world of computer related equipment. If all video recorders took different size/shaped tapes what would happen - I'm sure we all know the answer to that.

Given that Sony insist on pushing the Memory Stick you would think that they could have the decency to make its use compatible across their own equipment. For example, I have a Sony Ericsson K750i phone which I consider to be one of the best on the market still (I was an early adopter of this phone having previously had a T68i which in some ways was slightly better for me but more of that another time). This phone takes memory sticks and to be fair Sony provide one which is certainly sufficent for my needs with the phone. My phone has some MP3's on it, some video clips and some photo's as well as some calendar information etc - all pretty standard stuff these days.

I've very recently invested in a PSP which I am generally pleased with - it certainly relieved the tedium of flying to/from the US. However I am displeased with the memory stick and here's why. If I take the memory stick from my phone and put it into the PSP, it will show the photo's and that's it! No video and no MP3's (presumably unless they are in the right location/format). Is it just me or is this patently ridiculous. Just to add insult to injury the OS is being constantly upgraded so that people can't write their own software for it which means there will probably never be a calendar/contacts list/alarm/ other standard phone orPDA functionality.

You could argue that the PSP is primarily a multimedia machine but if that's the case why no radio or steaming of audio/video over the wireless connection? Why no Bluetooth or infra red? My phone can do pretty much all of these, the only thing it can't do is put them on a nice big screen.

Surely if Sony (and other companies) are going to force people to use essentially proprietry components they should at least make them work seamlessly across their equipment. Perhaps the PS3 is the answer to my prayers.