you can post to both at same time with a tool like ping.fm or hello.txt ... That is to send. To receive how about RSS combo

I got onto ping.fm so now i'm connected But I'm not sure I'd bother to do this when Twittering???

Some people seem to be doing both (durff and teach42). I'm still playing between/with each of the apps. No clue what I'll do in long run.

ping.fm is OK for the initial posts .. but still have to visit Plurk to see how your thread is goin? can only answer threads inside Plurk

to use the colorful qualifiers too like "likes" ... but I amtoo dependent on all the twitter APIs to let twitter go..