I actually played the fansubbed PC version of this for a couple hours about a year ago, and it was exasperatingly slow and tedious. Like, an hour in and I had barely fought a single battle.
Still, it may have improved later on...
So anyway, a PSP version is coming out, titled Utawareru Mono Portable:
http://aquaplus.jp/psp_uta/
http://dps.dengeki.com/2009/01/post_768.html
Source: http://postback.geedorah.com/foros/viewtopic.php?id=913
And here's Recap's thread for the PS2 port: http://postback.mforos.com/441648/32436 ... no-en-ps2/
And official sites for the previous versions:
http://aquaplus.jp/uta/ (PS2)
http://aquaplus.jp/udtc/ (PC)