Skip the extra tools - my customers already hang out in my inbox and buddy list
blog.olark.com
blog.olark.com
This rant really only applies to the suggestion of using a chat client - the interface to see their customers' pertinent information (logged in, pages browsed, location, unique visits) does look very helpful.
Also, sorry if it came off as a rant - I actually agree with thafman that extra tools can help large organizations with big customers. For us, we deal with many SMBs and other small organizations, so email is more than adequate for communicating with those customers.
In general, I'd say support bandwidth is dedicated more to a "moving window" of how many new customers you have, rather than total customer base. Most customers tend to be pretty low-touch after the first month, where they get most of their questions answered.
(btw, just posted a more detailed reply to your comment on the article itself)
This doesn't mean that you should go back to using plain email. It means that the CRM and issue tracking software sucks.
If you want to run a business with more than a few customers and keep your sanity, you have to have segregation.
Gmail / any mail client does not offer the tools you need to do really good customer service beyond a few customers, either.