Never mind the computer opponents when you get there (they're rarely actually online anyway), first thing to do when you get there is give a name and password, connect to their server, and see "WHO" is there with you. You will find English players there, but also French speaking and Romanian (this is a Romanian site). Choice of PODS or TWL (and french, romanian dicts too of course). Quite interesting!!!
Small server tho, so can't accommodate many players. It's like a cozy little online European Scrabble bistro =). Here's the link if it doesn't post right: http://web.ss.pub.ro
The player I just played... English is his second language... bingoed with STINKPOT!! I challenged it, unsuccessfully, and he passed back, because he doesn't like people missing turns!!! (What a change from games.com!!!) In return, I didn't go out on him at the end, when I could have =) He got about 330 with pretty mundane tiles.