Shipping is expensive, so I'm not especially interested in tangible goods unless they are locally hard to find (clothing/shoes for vegans, someone please do this), interesting (geeky gadgets? gifts?) or cheap (I sometimes buy computer hardware for BTC). I usually spend BTC on intangible goods, and I wish there were more things I can do online with Bitcoin. Bitcointorrentz is an interesting service for example. And I don't see nearly enough VPS and VoIP providers accepting Bitcoin.
The reason there are not a lot of VOIP providers is quite simply, it takes a lot of investment in time to implement a process in which payments can be made, most customers what everything in real time that means they do not want to wait, and therefore to process payments manually does not work, most bitcoin users use VOIP services from major players, not the small guys ironically it is the small guys that offer VOIP services for the tiny bitcoin market, the large VOIP vendors do not care about the success or failure of Bitcoin, nevertheless most bitcoin buyers prefer the big guys.
I know this for a fact, I ran a bitcoin voip bussiness, and nearly all my customers are non bitcoin users, the reason I ran the business in Bitcoin is because it is a sound currency that I strongly believe in, and what to help to make it a success, and many of the small voip providers that accept Bitcoin also want it to be a success, nevertheless the average bitcoin user that uses VOIP is using voip from a major vendor that has absolutely no interest whatsoever in the Bitcoin economy.
If you do not believe major VOIP vendors do not care about Bitcoin, mane me one that cares, I can not think of a single one, all the ones that do care are all small players, some smaller than others but none at the level of the big guys, the same can bit said about other areas in the bitcoin economy.
About a month ago I implemented a shopping cart to allow to buy phone credit in bitcoins, well the shopping cart has almost 0 customers.
Since the market is tiny for VOIP in Bitcoins, and most users using the large players which do not support Bitcoin, I think the VOIP market is very large for the demand that exists in Bitcoins, if you do not believe me take a look in the trade section under Bitcoin businesses for voip a lot of the Bitcoin VOIP providers from a year ago are gone now and the reason is lack of market.
And this problem is not only for VOIP it is for all products, a lot of small sellers and very few buyers, if we want Bitcoin to be successful we have to prefer using businesses that accept Bitcoins, that has a price to be paid and that is limited choices and usually small businesses nevertheless it is what is needed, I personally try whenever possible to spend bitcoins within the bitcoin community.
In brief, what I am trying to suggest is that we must try for the Bitcoin economy to depend on its own, would it not be great if you could go to the supermarket and pay directly in Bitcoins, or go to a parts store and be able to pay in Bitcoins, for that to happen we must support vendors that support bitcoins whenever possible and the market will grow, otherwise it will also grow but at a lot slower pace.