I too found the barwen.sh offer interesting. I only came upon this thread last night and am still thinking about what exactly I could use such an account for but the price point is certainly very interesting.
Would it be okay to run an IRC bot?
Maybe even one that does nothing other than keep a #channel in existence and op the "real" bots of the channel whenever they come back online. (A placeholder bot not one that people chat to etc.)
-MarkM-
yeah IRC bot is fine. the limits are on resident memory (so as long as your bot is not written in Java, you're probably OK) and bandwidth use and not abusing, rather than specific kinds of programs.
@grondilu: yeah there's CGI. But you aren't going to be able to host "large" things there - Nefario's service is much more appropriate for that.