First of let me start by saying that i think you've done an excellent job with this app so far and i think it has great potential. i have tried out
a lot if not all of the other similar type apps and this is the one i am currently using and enjoying most (it also seems that its still being actively developed

). After a couple weeks of usage here are some suggestions/ideas that i have come up with. Some of these I'm sure have already been mentioned:
*dynamically updating cache - this is something i think is greatly needed as a lot of times i want to work on files that i have recently created. It would be great to have the option to sync automatically when a file is changed/created, on an interval, or manually.
*ability to search for folders. Often times i remember the folder where something is located and not the specific filename
*ability to customize/rank search results. one option could be to rank results in the order they appear in the plugin such as the filesystem plugin for example. files from a dir higher up in the order would display first. in a similar fashion extensions could also be ranked in this fashion within each dir. i also like your idea of ranking results on usage/history
*the ability to browse through the filesystem after searching for or highlihgting any file at any time (ie type in mydoc.doc and then be able to use arrow keys to navigate up and down drive from that file. it often takes too long to start at the root

)
*to be able to arrange results either on multiple rows as it is now OR in multiple columns. i really like the info provided on the second line as it helps me in choosing the right results however i feel it looks a bit cluttered and slows down my ability to filter through to the correct result. it would be great to be able to display the info on multiple columns. this would also allow default/user specified columns to be added/hidden down the line to the filesystem plugin for example such as size, date, etc.
*something i have also really come to like in a similar program called AppRocket is the ability to pop-up the context menu or better yet would be a custom menu when pressing the right arrow key on a highlighted entry in the results window. i think this is really the most natural, simple and effective way to browse through the filesystem.
*custom actions for certain filetypes could also be inserted into this pop-up menu which would be specified in the preferences with a default action similar to how the outlook plugin works.
*it would also be great to be able to maintain a history for each entry of the websearch plugin or other plugins. this way after selecting google maps for example a history of all previous google maps searches would be displayed with the ability to filter through them as you continued to type. i often find myself entering in the same searches multiple times
*ability to specify contacts folder in contacts plugin and future outlook plugins. i have several different contact folders in outlook and it would be great to be able to select a non-default folder
*ability to create filters containing file extensions to be included/excluded when searching a directory. i often find entering the same set of extensions for multiple different folders
Plugin Ideas:
*it would be really cool to have a process plugin with columns for name, cpu, mem etc with actions to kill, optimise memory, lookup task in google perhaps . also you could filter down to a task as you continued to type
*active windows kinda of like a alt-tab replacement with actions to switch to, close, maximize, minimize, etc
Also the planned features you mentioned in the other thread look reaaaaaaaly nice and could potentially make this an absolute killer app. either way i think the fact that you have created a plugin architecture to begin with has some amazing possibilities.
Anyway i think i've rambled on enough for my first post

. keep up the great work!!!