Hello Lee,
I have done my own research concerning this search module from venexus by calling them. They have their own toll free number if you click on the contact us link and you can get a hold of one of their technitions starting at 9:00 AM EST or 4:00 AM England time. They are opened 12 hours a day Monday-Thursday I believe it is it might be thru Friday but certianly thru Thursday.
Anyway what I have learned from my correspondance was the following:
It is recommended that you have at least 512 MB at your disposal to utilize their search engine module. They told me it may work with 100 MB but it would be very sluggish and slow. In my case it probably would attempt to use more than 100 MB of RAM resources hence taking down my site. At any rate as far as the search features go they are extensive and according to them if you have at least 512 MB of RAM on your sql server2005 to work with you can search very fast and efficient.
What this search module will do is quickly and efficiently search content from your core modules on DNN (i.e. text/html, event, etc...) What it won't do is be able to find content from those third party modules you have installed on your Dotnetnuke Installation unless their is an RSS feed added to it since this search module finds rss feeds. It also will find excel and word documents. I believe it will also find powerpoint documents as well but I would double check on that if finding powerpoint documents is an issue for your dotnetnuke site.
Apparently you can enable the capability for global crawling which simply means it can crawl the entire internet if you want it to howbeit it may find much unwanted trash if you do that.
You also have a filtering capability which boils down to an approval process of items the search aggregaitor located and decide weather you want particular items to be able to be found by your visitors or not. I guess it is kind of like an approval system like one might have for posts but this would be approving indexed pages to be visable to a visitor via typing in a keyword in the search box.
It was an itneresting concept to me but that was pretty much the extent of it. If you are thinking of going for This module I would highly recommend exploring the possibility of a 12 month subscription for around $175. It may be a tiny bit more but not much. This would give you access to all their modules and skin objects for 12 months. Included in this would be updates for the time frame you are subsribed without extra costs.
The searchengine module at least their pro version was about $200 and acccording to my conversation with one of their representatives it appears that this 12 month subscription to all their modules and skins would give you more bang for the buch as it would give you the opportunity to download all the modules and skins they have for around $20 less than it would cost to by just that one search engine pro module.
They told me they were currently working on their pricing structure so if you are serious about using this search module as an alternative I would highly recommend you get on the stick right away before theiy have changed their pricing structure.
Really it could mean prices are being nogotiated to be lower but I have a feeling that this is not the case most likely they are working on a pricing structure that will include an increase in cost but while they are in the process of hashing this out it would be good to research it out for yourself and perhaps invest int he module or subscription now before prices possibly go up.
For me I will not get this module at this time do to the bottleneck I face with my hosting company only allocating 100 MB for my use but for those who are not under this bottleneck this might be a very wise investment especially if you are having issues with your DNN core search engine services causing issues of slowness or site recycling issues.
Anyway just figured I would give you my evaluation now so you can look at it and perhaps take a look at this site.
You can find information about their modules and about them at the following address:
http://www.venexus.com/ Good luck to all who are trying to investigate alternatives to your current internal search situations.
Bo