Danny,

I am no expert at heroku but here's what i know:

> First, the app uses a cron job to periodically query the Twitter API-
> can you support cron jobs, on the order of a 10-minute periodicity?

They will have this in the future. Right now, 1 hr cron's is what they
offer. One possible alternative/workaround is to remotely call a rake
task at a set interval. However,there is a timeout limit on the cron
jobs so you'll need to check what that timeout limit is.

> Second, the app has received approval from Twitter for unlimited API
> calls (i.e.- they have lifted their API rate limiting for this app).
> The way they do that is by IP address, so I've had to tell them the
> static IP that I have at Slicehost.  How could I deal with this if I
> deployed in your mesh?

First off, WooHoo! Congrats! Secondly, I don't think you'll find a
workaround for this. I've been in talks with McAfee about their
security seal feature but it also needs an IP.

> Lastly, the app will soon have a Delayed Job queue (http://github.com/
> tobi/delayed_job/tree/master)- this requires a separate instance
> running one or more workers, which are simply long-running rake
> tasks.  Can Heroku deal with this?

In the near future, yes. Today, no.

Hope this helps.
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