So, after many emails and telephone calls, this is what I learned:

Specialized (the bike maker) does not have any information about conversions to wide range cassettes.

Shimano (the component maker) does not make any rear cassettes with more than 27 teeth in 10 speed, and does not recommend after market conversions.

IRD (maker of wide range cassettes) said the following: "As far as compatibility and shifting performance, the two biggest factors will be the derailleur cage itself and the person setting it up. With the 30t, a short cage will be fine. On the bigger ones, the mid-cage mountain or mid (longer) cage road will usually work, but we officially recommend a long cage mountain derailleur. Shimano lists limits and we have found them to be overly conservative, really most short cage derailleurs will perform the same as other short cage derailleurs.Second, your local mechanic will be your best resource for fit. See what your shop recommends and refer back to the general derailleur length guidelines above."

This was very vague to me - it did not specify which rear derailleur to buy as there are many of them. I did not want to buy all these parts and then have the bike not work right. The 2 LBS that I went to and asked about the conversion said they did not shift as well. They recommended that I should learn to stand up and pedal...... It seems that on every ride here in the Santa Cruz Mountains, there are a few places with really steep, long grades that are not fun and could use a lower gear.

Then I went for a club ride and one of the women had what appeared to be a bigger cassette on her 10 speed triple road bike with 105. Her bike was custom made, so I asked for the maker's email address. He gave me a simple answer to the question of which components to buy (which was the same one that Unrealcycles had given me in the first place). " Lilly Ann has an 32 tooth IRD cassette with a Shimano 105 long cage rear derailleur as I remember, I also remember that the shifting seemed fine to me... Any good bike shop should be able to help you with that... A double crank shouldn't be a problem... You should stick with a 105 10 speed long cage derailleur as most MTB stuff is still 9 speed... Hopefully someone can get you rolling, it shouldn't be a big deal..."

So, I ordered a 12-32 IRD cassette, 105 chain, and 105 long cage derailleur today. It seemed logical to me that the reason that some people have problems with IRD cassettes and some don't is that the components are not compatible. Why would IRD recommend a MTB rear derailleur that is 9 speed and not a long cage road 10 speed derailleur that would fit better? Perhaps it may have to do with the larger 11-34 cassettes, but I don't need that.

I'll let you know how it works when I get it installed.